{"title":"Choate | Duramax Engines","description":"","products":[{"product_id":"6-6l-long-block-model-c-lmm-engine-choate-performance-2007-5-2010-duramax-diesel-engine-choate-performance","title":"6.6L Long Block Model C LMM Engine Choate Performance 2007.5-2010 - Duramax Diesel Engine Choate Performance","description":"\u003cp\u003eThe “Model C” is a budget-friendly build designed for those looking for an engine close to stock in power but with the common issues fixed.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Pickup","offer_id":50186800333104,"sku":"CEP66LMMLC","price":7995.0,"currency_code":"USD","in_stock":true},{"title":"KODIAK","offer_id":50186800365872,"sku":"CEP66LMMLCK","price":7995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Long-Block-Daily-Driver-MO4523-3-3-scaled.jpg?v=1759940720"},{"product_id":"6-6l-long-block-model-c-lly-engine-choate-performance-2004-5-2006-duramax-diesel-engine-choate-performance","title":"6.6L Long Block Model C LLY Engine Choate Performance 2004.5-2006 Duramax Diesel Engine Choate Performance","description":"\u003cp\u003eThe “Model C” is a budget-friendly build designed for those looking for an engine close to stock in power but with the common issues fixed.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Pickup","offer_id":50186800398640,"sku":"CEP66llylc","price":7995.0,"currency_code":"USD","in_stock":true},{"title":"KODIAK","offer_id":50186800431408,"sku":"CEP66LLYLCK","price":7995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Long-Block-Daily-Driver-MO4523-3-1-scaled.jpg?v=1759940738"},{"product_id":"6-6l-long-block-model-c-lbz-engine-choate-performance-2006-2007-duramax-diesel-engine-choate-performance","title":"6.6L Long Block Model C LBZ Engine Choate Performance 2006-2007 Duramax Diesel Engine Choate Performance","description":"\u003cp\u003eThe “Model C” is a budget-friendly build designed for those looking for an engine close to stock in power but with the common issues fixed.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Pickup","offer_id":50186800496944,"sku":"CEP66lbzlc","price":7995.0,"currency_code":"USD","in_stock":true},{"title":"KODIAK","offer_id":50186800529712,"sku":"CEP66LBZLCK","price":7995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Long-Block-Daily-Driver-MO4523-3-scaled.jpg?v=1759940789"},{"product_id":"6-6l-long-block-model-c-lb7-engine-choate-performance-2001-2004-duramax-diesel-engine-choate-performance","title":"6.6L Long Block Model C LB7 Engine Choate Performance 2001-2004 Duramax Diesel Engine Choate Performance","description":"\u003cp\u003eThe “Model C” is a budget-friendly build designed for those looking for an engine close to stock in power but with the common issues fixed.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Kodiak","offer_id":50377949315376,"sku":"CEP66LB7LCK","price":7995.0,"currency_code":"USD","in_stock":true},{"title":"Pickup","offer_id":50377949348144,"sku":"CEP66LB7LC","price":7995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Long-Block-Daily-Driver-MO4523-3-2-scaled.jpg?v=1759940806"},{"product_id":"6-6l-full-running-workhorse-lml-engine-choate-performance-2011-2016-duramax-diesel-engine-choate-performance","title":"6.6L Full Running Workhorse LML Engine Choate Performance 2011-2016 - Duramax Diesel Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Ringed Heads\u003c\/li\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Head Sealing:\u003c\/strong\u003e O-Ringed heads provide a superior seal, essential for maintaining integrity under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eIntended Use \u0026amp; Component Specification\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft and Chromoly Pushrods for enhanced strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Drop-In Ready:\u003c\/strong\u003e Ships complete with new water pumps, thermostats, OE harmonic balancer, flywheel, turbocharger, and all necessary sensors for a quick and comprehensive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eO-Ringed Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eNew Bed Seals\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSensors and Electronics\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFuel Rail Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eOil Level Sensor\u003c\/li\u003e\n\u003cli\u003eOil Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eCoolant Temp Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eNew Injectors\u003c\/li\u003e\n\u003cli\u003eFuel Rails\u003c\/li\u003e\n\u003cli\u003eCP4 to CP3 Conversion (Fuel Pump)\u003c\/li\u003e\n\u003cli\u003eWater Pump\u003c\/li\u003e\n\u003cli\u003eRocker Housings\u003c\/li\u003e\n\u003cli\u003eIntake Manifold\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold\u003c\/li\u003e\n\u003cli\u003eOil Cooler\u003c\/li\u003e\n\u003cli\u003eOil Filter\u003c\/li\u003e\n\u003cli\u003eOil Filter Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186800693552,"sku":"CEP66LMLFW","price":28500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-1-scaled_0.jpg?v=1759940833"},{"product_id":"6-6l-2011-2016-duramax-lml-short-block-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2011-2016 Duramax LML Short Block Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft for enhanced strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186800726320,"sku":"CEP66LMLSW","price":11100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/CEP66LB7SD-1.jpg?v=1759940847"},{"product_id":"6-6l-2011-2016-duramax-lml-short-block-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2011-2016 Duramax LML Short Block Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186800759088,"sku":"CEP66LMLSD","price":9000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LML-Short-Block-Daily-Driver-MO4574-1-scaled_0.jpg?v=1759940851"},{"product_id":"6-6l-2011-2016-duramax-lml-long-block-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2011-2016 Duramax LML Long Block Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Ringed Heads\u003c\/li\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Head Sealing:\u003c\/strong\u003e O-Ringed heads provide a superior seal, essential for maintaining integrity under high cylinder pressures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft and Chromoly Pushrods for enhanced strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eO-Ringed Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186800791856,"sku":"CEP66LMLLW","price":14800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-Long-Block-Daily-Driver-LML-MO4218-3-scaled.jpg?v=1759940868"},{"product_id":"6-6l-2011-2016-duramax-lml-long-block-model-c-diesel-crate-engine-choate-performance","title":"6.6L 2011-2016 Duramax LML Long Block Model C Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Model C” is a budget-friendly build designed for those looking for an engine close to stock in power but with the common issues fixed.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186800824624,"sku":"CEP66LMLLC","price":9250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LML-Long-Block-Workhorse-MO4220-3-scaled.jpg?v=1759940896"},{"product_id":"6-6l-2011-2016-duramax-lml-long-block-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2011-2016 Duramax LML Long Block Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Model C:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186800857392,"sku":"CEP66LMLLD","price":12999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-Long-Block-Daily-Driver-LML-MO4218-6-1-scaled.jpg?v=1759940914"},{"product_id":"6-6l-2011-2016-duramax-lml-full-running-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2011-2016 Duramax LML Full Running Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eIntended Use \u0026amp; Component Specification\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Drop-In Ready:\u003c\/strong\u003e Ships complete with new water pumps, thermostats, OE harmonic balancer, flywheel, turbocharger, and all necessary sensors for a quick and comprehensive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eNew Bed Seals\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSensors and Electronics\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFuel Rail Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eOil Level Sensor\u003c\/li\u003e\n\u003cli\u003eOil Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eCoolant Temp Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eNew Injectors\u003c\/li\u003e\n\u003cli\u003eFuel Rails\u003c\/li\u003e\n\u003cli\u003eCP4 to CP3 Conversion (Fuel Pump)\u003c\/li\u003e\n\u003cli\u003eWater Pump\u003c\/li\u003e\n\u003cli\u003eRocker Housings\u003c\/li\u003e\n\u003cli\u003eIntake Manifold\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold\u003c\/li\u003e\n\u003cli\u003eOil Cooler\u003c\/li\u003e\n\u003cli\u003eOil Filter\u003c\/li\u003e\n\u003cli\u003eOil Filter Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186800890160,"sku":"CEP66LMLFD","price":24500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-9-scaled.jpg?v=1759940946"},{"product_id":"6-6l-2007-5-2010-duramax-lmm-full-running-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2007.5-2010 Duramax LMM Full Running Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Ringed Heads\u003c\/li\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Head Sealing:\u003c\/strong\u003e O-Ringed heads provide a superior seal, essential for maintaining integrity under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eIntended Use \u0026amp; Component Specification\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft and Chromoly Pushrods for enhanced strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Drop-In Ready:\u003c\/strong\u003e Ships complete with new water pumps, thermostats, OE harmonic balancer, flywheel, turbocharger, and all necessary sensors for a quick and comprehensive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eO-Ringed Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSensors and Electronics\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFuel Rail Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eOil Level Sensor\u003c\/li\u003e\n\u003cli\u003eOil Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eCoolant Temp Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eNew Injectors\u003c\/li\u003e\n\u003cli\u003eFuel Rails\u003c\/li\u003e\n\u003cli\u003eCP3 Fuel Pump\u003c\/li\u003e\n\u003cli\u003eWater Pump\u003c\/li\u003e\n\u003cli\u003eRocker Housings\u003c\/li\u003e\n\u003cli\u003eIntake Manifold\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold\u003c\/li\u003e\n\u003cli\u003eOil Cooler\u003c\/li\u003e\n\u003cli\u003eOil Filter\u003c\/li\u003e\n\u003cli\u003eOil Filter Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186800922928,"sku":"CEP66LMMFW","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186800955696,"sku":"CEP66LMMFWM","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186800988464,"sku":"CEP66LMMFWK","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186801021232,"sku":"CEP66LMMFWKM","price":28500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-6-scaled.jpg?v=1759940961"},{"product_id":"6-6l-2007-5-2010-duramax-lmm-full-running-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2007.5-2010 Duramax LMM Full Running Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eIntended Use \u0026amp; Component Specification\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Drop-In Ready:\u003c\/strong\u003e Ships complete with new water pumps, thermostats, OE harmonic balancer, flywheel, turbocharger, and all necessary sensors for a quick and comprehensive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSensors and Electronics\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFuel Rail Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eOil Level Sensor\u003c\/li\u003e\n\u003cli\u003eOil Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eCoolant Temp Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eNew Injectors\u003c\/li\u003e\n\u003cli\u003eFuel Rails\u003c\/li\u003e\n\u003cli\u003eCP3 Fuel Pump\u003c\/li\u003e\n\u003cli\u003eWater Pump\u003c\/li\u003e\n\u003cli\u003eRocker Housings\u003c\/li\u003e\n\u003cli\u003eIntake Manifold\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold\u003c\/li\u003e\n\u003cli\u003eOil Cooler\u003c\/li\u003e\n\u003cli\u003eOil Filter\u003c\/li\u003e\n\u003cli\u003eOil Filter Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186801054000,"sku":"CEP66LMMFD","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186801086768,"sku":"CEP66LMMFDM","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186801119536,"sku":"CEP66LMMFDK","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186801152304,"sku":"CEP66LMMFDKM","price":24500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-7-scaled.jpg?v=1759940978"},{"product_id":"6-6l-2007-2010-duramax-lmm-short-block-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2007-2010 Duramax LMM Short Block Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft for enhanced strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186801185072,"sku":"CEP66LMMSW","price":11100.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186801217840,"sku":"CEP66LMMSWM","price":11100.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186801250608,"sku":"CEP66LMMSWK","price":11100.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186801283376,"sku":"CEP66LMMSWKM","price":11100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6L-Duramax-LBZ-Short-Block-Workhorse-scaled-1.jpg?v=1759941004"},{"product_id":"6-6l-2007-5-2010-duramax-lmm-long-block-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2007.5-2010 Duramax LMM Long Block Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Ringed Heads\u003c\/li\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Head Sealing:\u003c\/strong\u003e O-Ringed heads provide a superior seal, essential for maintaining integrity under high cylinder pressures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft and Chromoly Pushrods for enhanced strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eO-Ringed Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186801316144,"sku":"CEP66LMMLW","price":15000.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186801348912,"sku":"CEP66LMMLWM","price":15000.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186801381680,"sku":"CEP66LMMLWK","price":15000.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186801414448,"sku":"CEP66LMMLWKM","price":15000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-Long-Block-Workhorse-MO4586-2-page-001-1-scaled.jpg?v=1759941008"},{"product_id":"6-6l-2007-5-2010-duramax-lmm-long-block-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2007.5-2010 Duramax LMM Long Block Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Model C:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186801447216,"sku":"CEP66LMMLD","price":12700.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186801479984,"sku":"CEP66LMMLDM","price":12700.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186801512752,"sku":"CEP66LMMLDK","price":12700.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186801545520,"sku":"CEP66LMMLDKM","price":12700.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-Long-Block-Workhorse-MO4586-2-page-001-scaled_0.jpg?v=1759941026"},{"product_id":"6-6l-2007-5-2010-duramax-lmm-short-block-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2007.5-2010 Duramax LMM Short Block Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186801611056,"sku":"CEP66LMMSD","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186801643824,"sku":"CEP66LMMSDM","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186801676592,"sku":"CEP66LMMSDK","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186801709360,"sku":"CEP66LMMSDKM","price":9000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LML-Short-Block-Daily-Driver-MO4574-1-1-scaled_0.jpg?v=1759941061"},{"product_id":"6-6l-2006-2007-duramax-lbz-short-block-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2006-2007 Duramax LBZ Short Block Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft for enhanced strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186801742128,"sku":"CEP66LBZSW","price":11100.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186801774896,"sku":"CEP66LBZSWM","price":11100.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186801807664,"sku":"CEP66LBZSWK","price":11100.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186801840432,"sku":"CEP66LBZSWKM","price":11100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6L-Duramax-LBZ-Short-Block-Workhorse-scaled_0.jpg?v=1759941076"},{"product_id":"6-6l-2006-2007-duramax-lbz-short-block-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2006-2007 Duramax LBZ Short Block Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003e New Pistons\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186801873200,"sku":"CEP66LBZSD","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186801905968,"sku":"CEP66LBZSDM","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186801938736,"sku":"CEP66LBZSDK","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186801971504,"sku":"CEP66LBZSDKM","price":9000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LBZ-Short-Block-Daily-Driver-MO4536-6-scaled.jpg?v=1759941079"},{"product_id":"6-6l-2006-2007-duramax-lbz-long-block-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2006-2007 Duramax LBZ Long Block Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Ringed Heads\u003c\/li\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Head Sealing:\u003c\/strong\u003e O-Ringed heads provide a superior seal, essential for maintaining integrity under high cylinder pressures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft and Chromoly Pushrods for enhanced strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eO-Ringed Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186802004272,"sku":"CEP66LBZLW","price":14800.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186802037040,"sku":"CEP66LBZLWM","price":14800.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186802069808,"sku":"CEP66LBZLWK","price":14800.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186802102576,"sku":"CEP66LBZLWKM","price":14800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-Long-Block-Workhorse-MO4586-2-page-001-scaled.jpg?v=1759941112"},{"product_id":"6-6l-2006-2007-duramax-lbz-long-block-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2006-2007 Duramax LBZ Long Block Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Model C:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186802168112,"sku":"CEP66LBZLD","price":12750.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186802200880,"sku":"CEP66LBZLDM","price":12750.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186802233648,"sku":"CEP66LBZLDK","price":12750.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186802266416,"sku":"CEP66LBZLDKM","price":12750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-Long-Block-Daily-Driver-LML-MO4218-6-2-scaled_0.jpg?v=1759941142"},{"product_id":"6-6l-2006-2007-duramax-lbz-full-running-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2006-2007 Duramax LBZ Full Running Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Ringed Heads\u003c\/li\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Head Sealing:\u003c\/strong\u003e O-Ringed heads provide a superior seal, essential for maintaining integrity under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eIntended Use \u0026amp; Component Specification\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft and Chromoly Pushrods for enhanced strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Drop-In Ready:\u003c\/strong\u003e Ships complete with new water pumps, thermostats, OE harmonic balancer, flywheel, turbocharger, and all necessary sensors for a quick and comprehensive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eO-Ringed Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSensors and Electronics\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFuel Rail Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eOil Level Sensor\u003c\/li\u003e\n\u003cli\u003eOil Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eCoolant Temp Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eNew Injectors\u003c\/li\u003e\n\u003cli\u003eFuel Rails\u003c\/li\u003e\n\u003cli\u003eCP3 Fuel Pump\u003c\/li\u003e\n\u003cli\u003eWater Pump\u003c\/li\u003e\n\u003cli\u003eRocker Housings\u003c\/li\u003e\n\u003cli\u003eIntake Manifold\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold\u003c\/li\u003e\n\u003cli\u003eOil Cooler\u003c\/li\u003e\n\u003cli\u003eOil Filter\u003c\/li\u003e\n\u003cli\u003eOil Filter Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186802299184,"sku":"CEP66LBZFW","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186802331952,"sku":"CEP66LBZFWM","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186802364720,"sku":"CEP66LBZFWK","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186802397488,"sku":"CEP66LBZFWKM","price":28500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-2-scaled.jpg?v=1759941189"},{"product_id":"6-6l-2006-2007-duramax-lbz-full-running-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2006-2007 Duramax LBZ Full Running Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eIntended Use \u0026amp; Component Specification\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Drop-In Ready:\u003c\/strong\u003e Ships complete with new water pumps, thermostats, OE harmonic balancer, flywheel, turbocharger, and all necessary sensors for a quick and comprehensive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSensors and Electronics\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFuel Rail Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eOil Level Sensor\u003c\/li\u003e\n\u003cli\u003eOil Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eCoolant Temp Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eNew Injectors\u003c\/li\u003e\n\u003cli\u003eFuel Rails\u003c\/li\u003e\n\u003cli\u003eCP3 Fuel Pump\u003c\/li\u003e\n\u003cli\u003eWater Pump\u003c\/li\u003e\n\u003cli\u003eRocker Housings\u003c\/li\u003e\n\u003cli\u003eIntake Manifold\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold\u003c\/li\u003e\n\u003cli\u003eOil Cooler\u003c\/li\u003e\n\u003cli\u003eOil Filter\u003c\/li\u003e\n\u003cli\u003eOil Filter Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186802495792,"sku":"CEP66LBZFD","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186802528560,"sku":"CEP66LBZFDM","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186802561328,"sku":"CEP66LBZFDK","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186802594096,"sku":"CEP66LBZFDKM","price":24500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-3-scaled.jpg?v=1759941205"},{"product_id":"6-6l-2004-5-2006-duramax-lly-full-running-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2004.5-2006 Duramax LLY Full Running Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Ringed Heads\u003c\/li\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Head Sealing:\u003c\/strong\u003e O-Ringed heads provide a superior seal, essential for maintaining integrity under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eIntended Use \u0026amp; Component Specification\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft and Chromoly Pushrods for enhanced strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Drop-In Ready:\u003c\/strong\u003e Ships complete with new water pumps, thermostats, OE harmonic balancer, flywheel, turbocharger, and all necessary sensors for a quick and comprehensive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eO-Ringed Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSensors and Electronics\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFuel Rail Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eOil Level Sensor\u003c\/li\u003e\n\u003cli\u003eOil Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eCoolant Temp Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eNew Injectors\u003c\/li\u003e\n\u003cli\u003eFuel Rails\u003c\/li\u003e\n\u003cli\u003eCP3 Fuel Pump\u003c\/li\u003e\n\u003cli\u003eWater Pump\u003c\/li\u003e\n\u003cli\u003eRocker Housings\u003c\/li\u003e\n\u003cli\u003eIntake Manifold\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold\u003c\/li\u003e\n\u003cli\u003eOil Cooler\u003c\/li\u003e\n\u003cli\u003eOil Filter\u003c\/li\u003e\n\u003cli\u003eOil Filter Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186802659632,"sku":"CEP66LLYFW","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186802692400,"sku":"CEP66LLYFWM","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186802725168,"sku":"CEP66LLYFWK","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186802757936,"sku":"CEP66LLYFWKM","price":28500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-1-scaled.jpg?v=1759941231"},{"product_id":"6-6l-2004-5-2006-duramax-lly-full-running-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2004.5-2006 Duramax LLY Full Running Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eIntended Use \u0026amp; Component Specification\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Drop-In Ready:\u003c\/strong\u003e Ships complete with new water pumps, thermostats, OE harmonic balancer, flywheel, turbocharger, and all necessary sensors for a quick and comprehensive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSensors and Electronics\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFuel Rail Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eOil Level Sensor\u003c\/li\u003e\n\u003cli\u003eOil Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eCoolant Temp Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eNew Injectors\u003c\/li\u003e\n\u003cli\u003eFuel Rails\u003c\/li\u003e\n\u003cli\u003eCP3 Fuel Pump\u003c\/li\u003e\n\u003cli\u003eWater Pump\u003c\/li\u003e\n\u003cli\u003eRocker Housings\u003c\/li\u003e\n\u003cli\u003eIntake Manifold\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold\u003c\/li\u003e\n\u003cli\u003eOil Cooler\u003c\/li\u003e\n\u003cli\u003eOil Filter\u003c\/li\u003e\n\u003cli\u003eOil Filter Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186802790704,"sku":"CEP66LLYFD","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186802823472,"sku":"CEP66LLYFDM","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186802856240,"sku":"CEP66LLYFDK","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186802889008,"sku":"CEP66LLYFDKM","price":24500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-scaled.jpg?v=1759941259"},{"product_id":"6-6l-2004-5-2006-duramax-short-block-daily-driver-lly-diesel-crate-engine-choate-performance","title":"6.6L 2004.5-2006 Duramax Short Block Daily Driver LLY Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186802921776,"sku":"CEP66LLYSD","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186802954544,"sku":"CEP66LLYSDM","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186802987312,"sku":"CEP66LLYSDK","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186803020080,"sku":"CEP66LLYSDKM","price":9000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Short-Block-Daily-Driver-MO4524-1-scaled_0.jpg?v=1759941290"},{"product_id":"6-6l-2004-5-2006-duramax-lly-short-block-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2004.5-2006 Duramax LLY Short Block Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft for enhanced strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186803249456,"sku":"CEP66LLYSW","price":11100.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186803282224,"sku":"CEP66LLYSWM","price":11100.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186803314992,"sku":"CEP66LLYSWK","price":11100.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186803347760,"sku":"CEP66LLYSWKM","price":11100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6L-Duramax-LBZ-Short-Block-Workhorse-scaled_1.jpg?v=1759941310"},{"product_id":"6-6l-2004-5-2006-duramax-lly-long-block-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2004.5-2006 Duramax LLY Long Block Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Ringed Heads\u003c\/li\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Head Sealing:\u003c\/strong\u003e O-Ringed heads provide a superior seal, essential for maintaining integrity under high cylinder pressures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft and Chromoly Pushrods for enhanced strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eO-Ringed Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186803446064,"sku":"CEP66LLYLW","price":14800.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186803478832,"sku":"CEP66LLYLWM","price":14800.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186803511600,"sku":"CEP66LLYLWK","price":14800.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186803544368,"sku":"CEP66LLYLWKM","price":14800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Long-Block-Daily-Driver-MO4523-3-scaled_2.jpg?v=1759941314"},{"product_id":"6-6l-2004-5-2006-duramax-lly-long-block-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2004.5-2006 Duramax LLY Long Block Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Model C:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Automatic \/ Pickup","offer_id":50186803609904,"sku":"CEP66LLYLD","price":12500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ Pickup","offer_id":50186803642672,"sku":"CEP66LLYLDM","price":12500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186803675440,"sku":"CEP66LLYLDK","price":12500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186803708208,"sku":"CEP66LLYLDKM","price":12500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Long-Block-Daily-Driver-MO4523-3-scaled_1.jpg?v=1759941318"},{"product_id":"6-6l-2001-2004-long-block-workhorse-lb7-gm-duramax-diesel-crate-engine-choate-performance","title":"6.6L 2001-2004 Long Block Workhorse LB7 GM Duramax Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Ringed Heads\u003c\/li\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Head Sealing:\u003c\/strong\u003e O-Ringed heads provide a superior seal, essential for maintaining integrity under high cylinder pressures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft and Chromoly Pushrods for enhanced strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eO-Ringed Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Manual \/ Pickup","offer_id":50186803740976,"sku":"CEP66LB7LWM","price":14800.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186803773744,"sku":"CEP66LB7LWK","price":14800.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186803806512,"sku":"CEP66LB7LWKM","price":14800.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ Pickup","offer_id":50377963110704,"sku":"CEP66LB7LW","price":14800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-Long-Block-Daily-Driver-LML-MO4218-6-scaled_0.jpg?v=1759941379"},{"product_id":"6-6l-2001-2004-long-block-daily-driver-lb7-gm-duramax-diesel-crate-engine-choate-performance","title":"6.6L 2001-2004 Long Block Daily Driver LB7 GM Duramax Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Model C:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Manual \/ Pickup","offer_id":50186803904816,"sku":"CEP66LB7LDM","price":12500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186803937584,"sku":"CEP66LB7LDK","price":12500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186803970352,"sku":"CEP66LB7LDKM","price":12500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ Pickup","offer_id":50377956884784,"sku":"CEP66LB7LD","price":12500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Long-Block-Daily-Driver-MO4523-7-scaled.jpg?v=1759941432"},{"product_id":"6-6l-2001-2004-full-running-workhorse-lb7-duramax-diesel-crate-engine-choate-performance","title":"6.6L 2001-2004 Full Running Workhorse LB7 Duramax Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Ringed Heads\u003c\/li\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Head Sealing:\u003c\/strong\u003e O-Ringed heads provide a superior seal, essential for maintaining integrity under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eIntended Use \u0026amp; Component Specification\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft and Chromoly Pushrods for enhanced strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Drop-In Ready:\u003c\/strong\u003e Ships complete with new water pumps, thermostats, OE harmonic balancer, flywheel, turbocharger, and all necessary sensors for a quick and comprehensive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eO-Ringed Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eChromoly Pushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSensors and Electronics\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFuel Rail Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eOil Level Sensor\u003c\/li\u003e\n\u003cli\u003eOil Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eCoolant Temp Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eNew Injectors\u003c\/li\u003e\n\u003cli\u003eFuel Rails\u003c\/li\u003e\n\u003cli\u003eCP3 Fuel Pump\u003c\/li\u003e\n\u003cli\u003eWater Pump\u003c\/li\u003e\n\u003cli\u003eRocker Housings\u003c\/li\u003e\n\u003cli\u003eIntake Manifold\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold\u003c\/li\u003e\n\u003cli\u003eOil Cooler\u003c\/li\u003e\n\u003cli\u003eOil Filter\u003c\/li\u003e\n\u003cli\u003eOil Filter Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Manual \/ Pickup","offer_id":50186804003120,"sku":"CEP66LB7FWM","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186804035888,"sku":"CEP66LB7FWK","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186804068656,"sku":"CEP66LB7FWKM","price":28500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ Pickup","offer_id":50377919955248,"sku":"CEP66LB7FW","price":28500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-4-scaled.jpg?v=1759941448"},{"product_id":"6-6l-2001-2004-full-running-daily-driver-lb7-duramax-diesel-crate-engine-choate-performance","title":"6.6L 2001-2004 Full Running Daily Driver LB7 Duramax Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e Features all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eIntended Use \u0026amp; Component Specification\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Drop-In Ready:\u003c\/strong\u003e Ships complete with new water pumps, thermostats, OE harmonic balancer, flywheel, turbocharger, and all necessary sensors for a quick and comprehensive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSensors and Electronics\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFuel Rail Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eOil Level Sensor\u003c\/li\u003e\n\u003cli\u003eOil Pressure Sensor\u003c\/li\u003e\n\u003cli\u003eCoolant Temp Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eNew Injectors\u003c\/li\u003e\n\u003cli\u003eFuel Rails\u003c\/li\u003e\n\u003cli\u003eCP3 Fuel Pump\u003c\/li\u003e\n\u003cli\u003eWater Pump\u003c\/li\u003e\n\u003cli\u003eRocker Housings\u003c\/li\u003e\n\u003cli\u003eIntake Manifold\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold\u003c\/li\u003e\n\u003cli\u003eOil Cooler\u003c\/li\u003e\n\u003cli\u003eOil Filter\u003c\/li\u003e\n\u003cli\u003eOil Filter Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Injector Cups\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Manual \/ Pickup","offer_id":50186804101424,"sku":"CEP66LB7FDM","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186804134192,"sku":"CEP66LB7FDK","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186804166960,"sku":"CEP66LB7FDKM","price":24500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ Pickup","offer_id":50377916252464,"sku":"CEP66LB7FD","price":24500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-5-scaled.jpg?v=1759941465"},{"product_id":"6-6l-2001-2004-duramax-lb7-short-block-workhorse-diesel-crate-engine-choate-performance","title":"6.6L 2001-2004 Duramax LB7 Short Block Workhorse Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Workhorse” model is specifically designed for the working man who requires maximum durability and reliability for regular heavy hauling and strenuous towing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCoated, Fly Cut and Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eStage 2 Cam\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e600+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. The Workhorse takes this a step further with Coated, Flycut, and Delipped pistons for maximum thermal resistance and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2 Valvetrain \u0026amp; Drivetrain:\u003c\/strong\u003e Equipped with a Stage 2 Camshaft for enhanced strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eStage 2 Camshaft\u003c\/li\u003e\n\u003cli\u003eCoated, Flycut, \u0026amp; Delipped Pistons\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Manual \/ Pickup","offer_id":50186804199728,"sku":"CEP66LB7SWM","price":11500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186804232496,"sku":"CEP66LB7SWK","price":11500.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186804265264,"sku":"CEP66LB7SWKM","price":11500.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ Pickup","offer_id":50377969566000,"sku":"CEP66LB7SW","price":11500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6L-Duramax-LBZ-Short-Block-Workhorse-scaled.jpg?v=1759941501"},{"product_id":"6-6l-2001-2004-duramax-lb7-short-block-daily-driver-diesel-crate-engine-choate-performance","title":"6.6L 2001-2004 Duramax LB7 Short Block Daily Driver Diesel Crate Engine Choate Performance","description":"\u003cp\u003eThe “Daily Driver” model is specifically designed for spirited daily driving, consumer level towing, and everyday life.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e Rated for \u003cstrong\u003e500+ HP\u003c\/strong\u003e capability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e Precision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e Upgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eKeyed Crankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eNew Harmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNew Flex Plate (Flywheel is NOT included for manual builds!!!)\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eLifters\u003c\/li\u003e\n\u003cli\u003eNew Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eOil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eFront Cover and Gasket\u003c\/li\u003e\n\u003cli\u003eRear Main Seal\u003c\/li\u003e\n\u003cli\u003eFront Main Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Manual \/ Pickup","offer_id":50186804298032,"sku":"CEP66LB7SDM","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ KODIAK","offer_id":50186804330800,"sku":"CEP66LB7SDK","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Manual \/ KODIAK","offer_id":50186804363568,"sku":"CEP66LB7SDKM","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"Automatic \/ Pickup","offer_id":50377966518576,"sku":"CEP66LB7SD","price":9000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Short-Block-Daily-Driver-MO4524-1-scaled.jpg?v=1759941504"},{"product_id":"remanufactured-lb7-duramax-diesel-engine-2001-2004","title":"LB7 Duramax Remanufactured 6.6L Diesel Engine - 2001-2004","description":"\u003cul\u003e\n\u003cli\u003eFully Remanufactured - New Pistons, Lifters, Oil Pumps, and Sensors In Every Engine\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBetter Than Stock - Eliminates Several Factory Flaws\u003c\/li\u003e\n\u003cli\u003eBest Warranty In The Business\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSelect your block and build level to see a full product description with additional specs.\u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50770326323504,"sku":"CEP66LB7UNIV","price":7995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-4-scaled_b399c854-8581-4deb-a72f-235d750bb9b8.jpg?v=1771469956"},{"product_id":"remanufactured-lly-duramax-diesel-engine-2004-5-2006","title":"LLY Duramax Remanufactured 6.6L Diesel Engine - 2004.5-2006","description":"\u003cul\u003e\n\u003cli\u003eFully Remanufactured - New Pistons, Lifters, Oil Pumps, and Sensors In Every Engine\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBetter Than Stock - Eliminates Several Factory Flaws\u003c\/li\u003e\n\u003cli\u003eBest Warranty In The Business\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSelect your block and build level to see a full product description with additional specs.\u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50770326389040,"sku":"CEP66LLYUNIV","price":7995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-1-scaled_62513b59-9181-4b90-96fa-100ed2959007.jpg?v=1771469958"},{"product_id":"remanufactured-lbz-duramax-diesel-engine-2006-2007","title":"LBZ Duramax Remanufactured 6.6L Diesel Engine - 2006-2007","description":"\u003cul\u003e\n\u003cli\u003eFully Remanufactured - New Pistons, Lifters, Oil Pumps, and Sensors In Every Engine\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBetter Than Stock - Eliminates Several Factory Flaws\u003c\/li\u003e\n\u003cli\u003eBest Warranty In The Business\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSelect your block and build level to see a full product description with additional specs.\u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50770326421808,"sku":"CEP66LBZUNIV","price":7995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-2-scaled_a57fd040-df75-4ece-8d9b-bdab34f9d609.jpg?v=1771469960"},{"product_id":"remanufactured-lmm-duramax-diesel-engine-2007-5-2010","title":"LMM Duramax Remanufactured 6.6L Diesel Engine - 2007.5-2010","description":"\u003cul\u003e\n\u003cli\u003eFully Remanufactured - New Pistons, Lifters, Oil Pumps, and Sensors In Every Engine\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBetter Than Stock - Eliminates Several Factory Flaws\u003c\/li\u003e\n\u003cli\u003eBest Warranty In The Business\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSelect your block and build level to see a full product description with additional specs.\u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50770326487344,"sku":"CEP66LMMUNIV","price":7995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-6-scaled_1644bfe2-b616-4488-9f2f-2519b7c3bce9.jpg?v=1771469962"},{"product_id":"remanufactured-lml-duramax-diesel-engine-2011-2016","title":"LML Duramax Remanufactured 6.6L Diesel Engine - 2011-2016","description":"\u003cul\u003e\n\u003cli\u003eFully Remanufactured - New Pistons, Lifters, Oil Pumps, and Sensors In Every Engine\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBetter Than Stock - Eliminates Several Factory Flaws\u003c\/li\u003e\n\u003cli\u003eBest Warranty In The Business\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSelect your block and build level to see a full product description with additional specs.\u003c\/p\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50770326552880,"sku":"CEP66LMLUNIV","price":9250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-Duramax-LLY-Full-Runner-1-1-scaled_0_18fb563c-19b9-43de-b8ed-43f5011dd2a9.jpg?v=1771469964"}],"url":"https:\/\/choateperformance.com\/collections\/choate-duramax-engines.oembed","provider":"choateperformance","version":"1.0","type":"link"}