{"title":"Choate | Duramax Products","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. 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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. 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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. 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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. 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This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. 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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. 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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. 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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. 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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. 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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. 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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. 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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. 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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. 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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. 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This solves the OEM issue of weak pistons that are prone to cracking under heat and boost. 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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. 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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. 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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. 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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. 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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. 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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. 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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. 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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. 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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. 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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. 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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":"lb7-daily-driver-cylinder-head-reman-choate-performance","title":"LB7 Daily Driver Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting: \u003c\/strong\u003eBuilt from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valve Springs and Retainers:\u003c\/strong\u003e Utilizes brand-new valve springs matched to the engine's requirements and durable retainers and locks for secure operation, even at higher RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817732912,"sku":"CEPLB7DHR","price":1360.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-LB7-Duramax-Head-page-001-scaled.jpg?v=1775237536"},{"product_id":"lb7-workhorse-cylinder-head-reman-choate-performance","title":"LB7 Workhorse Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThe “Workhorse” model is specifically designed for sustained heavy-duty work and frequent towing. Features upgraded components to handle higher cylinder pressures and heat from frequent loads and moderate performance tunes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting:\u003c\/strong\u003e Built from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valve Springs and Retainers:\u003c\/strong\u003e Utilizes brand-new valve springs matched to the engine's requirements and durable retainers and locks for secure operation, even at higher RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e\n","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817765680,"sku":"CEPLB7WHR","price":1659.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/LB7WorkhorseandWorkhorsePlusCylinderHead.png?v=1775237518"},{"product_id":"lb7-workhorse-plus-cylinder-head-reman-choate-performance","title":"LB7 Workhorse Plus Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThe “Workhorse Plus” model is specifically designed for the most extreme demands, including heavy towing, drag racing, and sled pulling. The cylinder head features premium, high-strength components to handle maximum cylinder pressures and high-performance tuning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Workhorse:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHD Valve Springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting: \u003c\/strong\u003eBuilt from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHD Valve Springs:\u003c\/strong\u003e Installed with upgraded, heavy-duty valve springs and retainers to prevent valve float at high RPMs and high boost pressures, ensuring valve train stability and maximum performance under demanding conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817798448,"sku":"CEPLB7WPHR","price":2059.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/LB7WorkhorseandWorkhorsePlusCylinderHead.png?v=1775237518"},{"product_id":"lbz-daily-driver-cylinder-head-reman-choate-performance","title":"LBZ Daily Driver Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting: \u003c\/strong\u003eBuilt from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valve Springs and Retainers:\u003c\/strong\u003e Utilizes brand-new valve springs matched to the engine's requirements and durable retainers and locks for secure operation, even at higher RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817831216,"sku":"CEPLBZDHR","price":1260.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/Photo-Edits-for-Website_0.png?v=1759943295"},{"product_id":"lbz-workhorse-cylinder-head-reman-choate-performance","title":"LBZ Workhorse Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThe “Workhorse” model is specifically designed for sustained heavy-duty work and frequent towing. Features upgraded components to handle higher cylinder pressures and heat from frequent loads and moderate performance tunes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting:\u003c\/strong\u003e Built from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valve Springs and Retainers:\u003c\/strong\u003e Utilizes brand-new valve springs matched to the engine's requirements and durable retainers and locks for secure operation, even at higher RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e\n","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817863984,"sku":"CEPLBZWHR","price":1559.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/Photo-Edits-for-Website_3.png?v=1759943542"},{"product_id":"lbz-workhorse-plus-cylinder-head-reman-choate-performance","title":"LBZ Workhorse Plus Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThe “Workhorse Plus” model is specifically designed for the most extreme demands, including heavy towing, drag racing, and sled pulling. The cylinder head features premium, high-strength components to handle maximum cylinder pressures and high-performance tuning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Workhorse:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHD Valve Springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting: \u003c\/strong\u003eBuilt from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHD Valve Springs:\u003c\/strong\u003e Installed with upgraded, heavy-duty valve springs and retainers to prevent valve float at high RPMs and high boost pressures, ensuring valve train stability and maximum performance under demanding conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817896752,"sku":"CEPLBZWPHR","price":1959.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/Photo-Edits-for-Website_6.png?v=1759943549"},{"product_id":"lly-daily-driver-cylinder-head-reman-choate-performance","title":"LLY Daily Driver Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting: \u003c\/strong\u003eBuilt from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valve Springs and Retainers:\u003c\/strong\u003e Utilizes brand-new valve springs matched to the engine's requirements and durable retainers and locks for secure operation, even at higher RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817929520,"sku":"CEPLLYDHR","price":1260.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/Photo-Edits-for-Website.png?v=1759943581"},{"product_id":"lly-workhorse-cylinder-head-reman-choate-performance","title":"LLY Workhorse Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThe “Workhorse” model is specifically designed for sustained heavy-duty work and frequent towing. Features upgraded components to handle higher cylinder pressures and heat from frequent loads and moderate performance tunes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting:\u003c\/strong\u003e Built from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valve Springs and Retainers:\u003c\/strong\u003e Utilizes brand-new valve springs matched to the engine's requirements and durable retainers and locks for secure operation, even at higher RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e\n","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817995056,"sku":"CEPLLYWHR","price":1559.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/Photo-Edits-for-Website_2.png?v=1759943589"},{"product_id":"lly-workhorse-plus-cylinder-head-reman-choate-performance","title":"LLY Workhorse Plus Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThe “Workhorse Plus” model is specifically designed for the most extreme demands, including heavy towing, drag racing, and sled pulling. The cylinder head features premium, high-strength components to handle maximum cylinder pressures and high-performance tuning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Workhorse:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHD Valve Springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting: \u003c\/strong\u003eBuilt from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHD Valve Springs:\u003c\/strong\u003e Installed with upgraded, heavy-duty valve springs and retainers to prevent valve float at high RPMs and high boost pressures, ensuring valve train stability and maximum performance under demanding conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186818027824,"sku":"CEPLLYWPHR","price":1959.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/Photo-Edits-for-Website_5.png?v=1759943596"},{"product_id":"lml-daily-driver-cylinder-head-reman-choate-performance","title":"LML Daily Driver Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting: \u003c\/strong\u003eBuilt from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valve Springs and Retainers:\u003c\/strong\u003e Utilizes brand-new valve springs matched to the engine's requirements and durable retainers and locks for secure operation, even at higher RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186818093360,"sku":"CEPLMLDHR","price":1310.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.6-LML-Duramax-Head-page-001-scaled.jpg?v=1759943304"},{"product_id":"lml-workhorse-cylinder-head-reman-choate-performance","title":"LML Workhorse Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThe “Workhorse” model is specifically designed for sustained heavy-duty work and frequent towing. Features upgraded components to handle higher cylinder pressures and heat from frequent loads and moderate performance tunes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting:\u003c\/strong\u003e Built from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valve Springs and Retainers:\u003c\/strong\u003e Utilizes brand-new valve springs matched to the engine's requirements and durable retainers and locks for secure operation, even at higher RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186818224432,"sku":"CEPLMLWHR","price":1559.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/LMLDuramaxWorkhorseCylinderHead_4d51ffc0-cd22-4c21-9e4e-f701ecbcbfd0.png?v=1778250347"},{"product_id":"lml-workhorse-plus-cylinder-head-reman-choate-performance","title":"LML Workhorse Plus Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThe “Workhorse Plus” model is specifically designed for the most extreme demands, including heavy towing, drag racing, and sled pulling. The cylinder head features premium, high-strength components to handle maximum cylinder pressures and high-performance tuning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Workhorse:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHD Valve Springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting: \u003c\/strong\u003eBuilt from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHD Valve Springs:\u003c\/strong\u003e Installed with upgraded, heavy-duty valve springs and retainers to prevent valve float at high RPMs and high boost pressures, ensuring valve train stability and maximum performance under demanding conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186818257200,"sku":"CEPLMLWPHR","price":1959.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/LMLDuramaxWorkhorseCylinderHead.png?v=1778250306"},{"product_id":"lmm-daily-driver-cylinder-head-reman-choate-performance","title":"LMM Daily Driver Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting: \u003c\/strong\u003eBuilt from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valve Springs and Retainers:\u003c\/strong\u003e Utilizes brand-new valve springs matched to the engine's requirements and durable retainers and locks for secure operation, even at higher RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186818289968,"sku":"CEPLMMDHR","price":1260.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/50.png?v=1759943376"},{"product_id":"lmm-workhorse-cylinder-head-reman-choate-performance","title":"LMM Workhorse Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThe “Workhorse” model is specifically designed for sustained heavy-duty work and frequent towing. Features upgraded components to handle higher cylinder pressures and heat from frequent loads and moderate performance tunes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Daily Driver:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO-Rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting:\u003c\/strong\u003e Built from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valve Springs and Retainers:\u003c\/strong\u003e Utilizes brand-new valve springs matched to the engine's requirements and durable retainers and locks for secure operation, even at higher RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186818322736,"sku":"CEPLMMWHR","price":1559.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/50_0.png?v=1759943614"},{"product_id":"lmm-workhorse-plus-cylinder-head-reman-choate-performance","title":"LMM Workhorse Plus Cylinder Head Reman Choate Performance","description":"\u003cdiv class=\"free-shipping-box\"\u003e\n\u003cspan class=\"shipping-icon\"\u003e🚚\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e This product qualifies for free standard shipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .free-shipping-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #f0fdf4; \/* Light clean green background *\/\n    border-left: 4px solid #16a34a; \/* Green accent line *\/\n    padding: 12px 15px;\n    margin: 15px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #1e293b;\n  }\n  .shipping-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .free-shipping-box p {\n    margin: 0;\n  }\n  .free-shipping-box strong {\n    color: #14532d; \/* Dark green for the emphasis text *\/\n  }\n\u003c\/style\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003eThe “Workhorse Plus” model is specifically designed for the most extreme demands, including heavy towing, drag racing, and sled pulling. The cylinder head features premium, high-strength components to handle maximum cylinder pressures and high-performance tuning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Workhorse:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHD Valve Springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Testing:\u003c\/strong\u003e After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlow-Proof Plugs:\u003c\/strong\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Quality Control:\u003c\/strong\u003e The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve Recessions\u003c\/li\u003e\n\u003cli\u003eStem Heights\u003c\/li\u003e\n\u003cli\u003eInstalled Spring Heights\u003c\/li\u003e\n\u003cli\u003eSpring Pressures\u003c\/li\u003e\n\u003cli\u003eKeeper and Lock Positions\u003c\/li\u003e\n\u003cli\u003eRA Recording\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemanufactured Casting: \u003c\/strong\u003eBuilt from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Valves:\u003c\/strong\u003e Equipped with new, high-quality intake and exhaust valves that are inspected for proper seating and clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHD Valve Springs:\u003c\/strong\u003e Installed with upgraded, heavy-duty valve springs and retainers to prevent valve float at high RPMs and high boost pressures, ensuring valve train stability and maximum performance under demanding conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Injector Cups:\u003c\/strong\u003e Pre-installed new injector cups for proper fuel sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\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 has incorporated critical modifications and features to address common failure points of the factory Duramax cylinder heads, drastically improving reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Sealing Surface:\u003c\/strong\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Train Geometry Alteration:\u003c\/strong\u003e We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifter Longevity Fix:\u003c\/strong\u003e Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow:\u003c\/strong\u003e Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Prep:\u003c\/strong\u003e Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Components:\u003c\/strong\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Rings:\u003c\/strong\u003e For enhanced durability, o-rings are cut and installed into the deck surface to dramatically improve sealing under high cylinder pressures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eMeticulous Cleaning and Prep Process\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigorous Inspection:\u003c\/strong\u003e Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Relieving:\u003c\/strong\u003e The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Relaxation:\u003c\/strong\u003e The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Removal:\u003c\/strong\u003e All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"cylinder-notice-box\"\u003e\n\u003cspan class=\"notice-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This product is sold individually and contains components for one (1) cylinder head only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cylinder-notice-box {\n    display: flex;\n    align-items: center;\n    gap: 12px;\n    background-color: #fff9e6; \/* Light amber background *\/\n    border-left: 4px solid #d48c00; \/* Darker amber accent line *\/\n    padding: 12px 15px;\n    margin: 20px 0;\n    border-radius: 4px;\n    font-size: 14px;\n    line-height: 1.4;\n    color: #4a4a4a;\n  }\n  .notice-icon {\n    font-size: 18px;\n    line-height: 1;\n    flex-shrink: 0;\n  }\n  .cylinder-notice-box p {\n    margin: 0; \/* Prevents theme from adding extra spacing *\/\n  }\n  .cylinder-notice-box strong {\n    color: #000;\n  }\n\u003c\/style\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186818355504,"sku":"CEPLMMWPHR","price":1959.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/50_1.png?v=1759943712"}],"url":"https:\/\/choateperformance.com\/collections\/duramax.oembed?page=5","provider":"choateperformance","version":"1.0","type":"link"}