{"title":"Choate | Duramax Cylinder Heads","description":"","products":[{"product_id":"lb7-daily-driver-cylinder-head-reman-choate-performance","title":"LB7 Daily Driver Cylinder Head Reman Choate Performance","description":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\u003cp\u003e6.6 Duramax Lb7 Daily Driver Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLB7DHR\u003c\/p\u003e\u003cp\u003eOE Part number: 97779578\u003cbr\u003eFitment: 2001, 2002, 2003, 2004\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LB7 Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eNew Injector cups and oring's\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\u003cp\u003e6.6 Duramax Lb7 Workhorse Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLB7WHR\u003c\/p\u003e\u003cp\u003eOE Part number: 97779578\u003cbr\u003eFitment: 2001, 2002, 2003, 2004\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LB7 Workhorse Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eNew Injector cups and oring's\u003c\/li\u003e\n\u003cli\u003eMachined O'ring\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Workhorse Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003eWe O-ring our Workhorse heads to eliminate factory head gasket issues. A receiver groove is machined into the deck surface, and a USA-made stainless steel wire is pressed in, applying extra pressure to the MLS gaskets and sealing combustion pressure.\u003c\/p\u003e\u003cp\u003eThe durable, reusable high-carbon stainless wire works with standard head gaskets and requires no special block machining-just a clean, dry, flat deck surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Workhorse Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e6 Months warranty on Cylinder heads. Parts warranty only.\u003c\/p\u003e","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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003cbr\u003e6.6 Duramax Lb7 Workhorse Plus Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLB7WPHR\u003cbr\u003eOE Part number: 97779578\u003cbr\u003eFitment: 2001, 2002, 2003, 2004\u003cbr\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LB7 Workhorse Plus Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eNew Injector cups and oring's\u003c\/li\u003e\n\u003cli\u003eMachined O'rings\u003c\/li\u003e\n\u003cli\u003eHeavy Duty Valve Springs 130lb. seat pressure at 1.720 (to the top of the retainer) installed height.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6L Workhorse Plus Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003cbr\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003cbr\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003cbr\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003eWe O-ring our Workhorse heads to eliminate factory head gasket issues. A receiver groove is machined into the deck surface, and a USA-made stainless steel wire is pressed in, applying extra pressure to the MLS gaskets and sealing combustion pressure.\u003c\/p\u003e\u003cp\u003eThe durable, reusable high-carbon stainless wire works with standard head gaskets and requires no special block machining-just a clean, dry, flat deck surface.\u003cbr\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003cbr\u003eOnce our machining processes are complete, we pressure test the 6.6 Workhorse Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003eWe measure the following specs by use of profilometer:\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e\u003cbr\u003e6 Months warranty on Cylinder heads. Parts warranty only.\u003c\/p\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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\u003cp\u003e6.6 Duramax LBZ Daily Driver Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLBZDHR\u003c\/p\u003e\u003cp\u003eOE Part number: 98025702, 1290608\u003cbr\u003eFitment: 2006, 2007\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LBZ Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003eWarranty:\u003cbr\u003e6 Months warranty on Cylinder heads. Parts warranty only.\u003c\/p\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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head. Oring Not pictured.\u003c\/p\u003e\u003cp\u003e6.6 Duramax LBZ Workhorse Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLBZWHR\u003c\/p\u003e\u003cp\u003eOE Part number: 98025702, 1290608\u003cbr\u003eFitment: 2006, 2007\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LBZ Workhorse Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eOring Machined\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003eWe O-ring our Workhorse heads to eliminate factory head gasket issues. A receiver groove is machined into the deck surface, and a USA-made stainless steel wire is pressed in, applying extra pressure to the MLS gaskets and sealing combustion pressure.\u003c\/p\u003e\u003cp\u003eThe durable, reusable high-carbon stainless wire works with standard head gaskets and requires no special block machining-just a clean, dry, flat deck surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\u003e","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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head. Oring Not pictured.\u003c\/p\u003e\u003cp\u003e6.6 Duramax LBZ Workhorse Plus Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLBZWPHR\u003c\/p\u003e\u003cp\u003eOE Part number: 98025702, 1290608\u003cbr\u003eFitment: 2006, 2007\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LBZ Workhorse Plus Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eOring Machined\u003c\/li\u003e\n\u003cli\u003eHeavy Duty Valve Springs. 130lb. seat pressure at 1.720 (to the top of the retainer) installed height\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003eWe O-ring our Workhorse heads to eliminate factory head gasket issues. A receiver groove is machined into the deck surface, and a USA-made stainless steel wire is pressed in, applying extra pressure to the MLS gaskets and sealing combustion pressure.\u003c\/p\u003e\u003cp\u003eThe durable, reusable high-carbon stainless wire works with standard head gaskets and requires no special block machining-just a clean, dry, flat deck surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\u003cp\u003e6.6 Duramax LLY Daily Driver Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLLYDHR\u003c\/p\u003e\u003cp\u003eOE Part number: 97779579\u003cbr\u003eFitment: 2004,2004.5, 2005\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LLY Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e6 Months warranty on Cylinder heads. Parts warranty only.\u003c\/p\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":"\u003cp\u003eThis upgraded 6.6 LLY workhorse duramax cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\u003cp\u003e6.6 Duramax LLY Workhorse Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLLYWHR\u003c\/p\u003e\u003cp\u003eOE Part number: 97779579\u003cbr\u003eFitment: 2004,2004.5, 2005\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LLY Workhorse Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eO'ring Machined\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce your 6.6 Workhorse Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003eWe O-ring our Workhorse heads to eliminate factory head gasket issues. A receiver groove is machined into the deck surface, and a USA-made stainless steel wire is pressed in, applying extra pressure to the MLS gaskets and sealing combustion pressure.\u003c\/p\u003e\u003cp\u003eThe durable, reusable high-carbon stainless wire works with standard head gaskets and requires no special block machining-just a clean, dry, flat deck surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head\u003c\/p\u003e","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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\u003cp\u003e6.6 Duramax LLY Workhorse Plus Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLLYWPHR\u003c\/p\u003e\u003cp\u003eOE Part number: 97779579\u003cbr\u003eFitment: 2004,2004.5, 2005\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LLY Workhorse Plus Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eO'ring Machined\u003c\/li\u003e\n\u003cli\u003eHeavy Duty Valve Springs . 130lb. seat pressure at 1.720 (to the top of the retainer) installed height\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce your 6.6 Workhorse Plus Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003eWe O-ring our Workhorse heads to eliminate factory head gasket issues. A receiver groove is machined into the deck surface, and a USA-made stainless steel wire is pressed in, applying extra pressure to the MLS gaskets and sealing combustion pressure.\u003c\/p\u003e\u003cp\u003eThe durable, reusable high-carbon stainless wire works with standard head gaskets and requires no special block machining-just a clean, dry, flat deck surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\u003cp\u003e6.6 Duramax LML Daily Driver Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLMLDHR\u003c\/p\u003e\u003cp\u003eOE Part number: 12690607, 12646217\u003cbr\u003eFitment: 2011, 2012, 2013, 2014, 2015, 2016\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LML Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e6 Months warranty on Cylinder heads. Parts warranty only.\u003c\/p\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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\u003cp\u003e6.6 Duramax LML Workhorse Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLMLWHR\u003c\/p\u003e\u003cp\u003eOE Part number: 12690607, 12646217\u003cbr\u003eFitment: 2011, 2012, 2013, 2014, 2015, 2016\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LML Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eO'Ringed\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head. Oring is not pictured\u003c\/p\u003e\u003cp\u003e6.6L Duramax LML Workhorse Plus Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLMLWPHR\u003c\/p\u003e\u003cp\u003eOE Part number: 12690607, 12646217\u003cbr\u003eFitment: 2011, 2012, 2013, 2014, 2015, 2016\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6L LML Workhorse Plus Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eO'ringed\u003c\/li\u003e\n\u003cli\u003eHeavy Duty Valve Springs 130lb. seat pressure at 1.720 (to the top of the retainer) installed height\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Workhorse Plus Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will subsequently begin the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYour 6.6L Workhorse Plus Engines heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003eWe O-ring our Workhorse heads to eliminate factory head gasket issues. A receiver groove is machined into the deck surface, and a USA-made stainless steel wire is pressed in, applying extra pressure to the MLS gaskets and sealing combustion pressure. The durable, reusable high-carbon stainless wire works with standard head gaskets and requires no special block machining-just a clean, dry, flat deck surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6L Duramax Workhorse cylinder heads with 40 PSI pressure to ensure there are no leaks. Subsequently, we send them through another extensive cleaning, followed by a quality control inspection and a sign-off sheet that includes all specs of the heads. Additionally, we measure the following specs using a profilometer:\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e6 Months warranty on Cylinder heads. Parts warranty only.\u003c\/p\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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\u003cp\u003e6.6 Duramax LMM Daily Driver Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLMMDHR\u003c\/p\u003e\u003cp\u003eOE Part number: 98025702, 1290608\u003cbr\u003eFitment: 2007,2007.5, 2008, 2009, 2010\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LMM Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e6 Months warranty on Cylinder heads. Parts warranty only.\u003c\/p\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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\n\u003cp\u003e6.6 Duramax LMM Workhorse Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLMMWHR\u003c\/p\u003e\n\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6.6 LMM Workhorse Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eMachined O'ring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\n\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\n\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\n\u003cp\u003eWe O-ring our Workhorse heads to eliminate factory head gasket issues. A receiver groove is machined into the deck surface, and a USA-made stainless steel wire is pressed in, applying extra pressure to the MLS gaskets and sealing combustion pressure.\u003c\/p\u003e\n\u003cp\u003eThe durable, reusable high-carbon stainless wire works with standard head gaskets and requires no special block machining-just a clean, dry, flat deck surface.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto;\" class=\"choate-table-container\"\u003e\n\u003ctable style=\"width: 100% !important; border-collapse: collapse !important; margin: 20px 0 !important; font-family: Arial, sans-serif !important; border: 1px solid #ddd !important;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"background-color: #2c3e50 !important; color: white !important; padding: 12px !important; border: 1px solid #ddd !important; text-align: left !important;\"\u003eEngine Code\u003c\/th\u003e\n\u003cth style=\"background-color: #2c3e50 !important; color: white !important; padding: 12px !important; border: 1px solid #ddd !important; text-align: left !important;\"\u003eSide\u003c\/th\u003e\n\u003cth style=\"background-color: #2c3e50 !important; color: white !important; padding: 12px !important; border: 1px solid #ddd !important; text-align: left !important;\"\u003eOEM Part #\u003c\/th\u003e\n\u003cth style=\"background-color: #2c3e50 !important; color: white !important; padding: 12px !important; border: 1px solid #ddd !important; text-align: left !important;\"\u003eReplaces\/Interchangeable\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #333 !important;\"\u003eLMM\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #333 !important;\"\u003eLeft (Driver)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #333 !important;\"\u003e98002164\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #333 !important;\"\u003e97388715\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #333 !important;\"\u003eLMM\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #333 !important;\"\u003eRight (Pass.)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #333 !important;\"\u003e98002165\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #333 !important;\"\u003e997388716\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\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":"\u003cp\u003eThis upgraded 6.6 Duramax Diesel engine cylinder head is a great choice for an improvement over stock. This listing is for 1 Cylinder Head.\u003c\/p\u003e\u003cp\u003e6.6 Duramax LMM Workhorse Plus Cylinder Head Reman\u003cbr\u003eChoate Part Number: CEPLMMWPHR\u003c\/p\u003e\u003cp\u003eOE Part number: 98025702, 1290608\u003cbr\u003eFitment: 2007,2007.5, 2008, 2009, 2010\u003c\/p\u003e\u003cp\u003eManufacturer: Choate Engineering Performance\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.6 LMM Workhorse Plus Duramax Remanufactured Diesel Engine Cylinder Heads Include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.\u003c\/li\u003e\n\u003cli\u003eUsed Cast\u003c\/li\u003e\n\u003cli\u003eNew Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eRegrind Valves and inspect margins for proper sealing.\u003c\/li\u003e\n\u003cli\u003eCut seats with 3 angles and optimize flow.\u003c\/li\u003e\n\u003cli\u003eMachined O'ring\u003c\/li\u003e\n\u003cli\u003eWagler Heavy Duty Valve springs. 130lb. seat pressure at 1.720 (to the top of the retainer) installed height\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCleaning Process:\u003c\/strong\u003e\u003cbr\u003eOnce the 6.6 Duramax Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.\u003c\/p\u003e\u003cp\u003eThen we shot blast it in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.\u003cbr\u003eAfter this, we check it for any broken bolts or studs, and remove them.\u003c\/p\u003e\u003cp\u003eOnce it has met our stringent standards, it will then start through the machining process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMachining Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOur heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.\u003c\/p\u003e\u003cp\u003eWe O-ring our Workhorse heads to eliminate factory head gasket issues. A receiver groove is machined into the deck surface, and a USA-made stainless steel wire is pressed in, applying extra pressure to the MLS gaskets and sealing combustion pressure.\u003c\/p\u003e\u003cp\u003eThe durable, reusable high-carbon stainless wire works with standard head gaskets and requires no special block machining-just a clean, dry, flat deck surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInspection Process:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnce our machining processes are complete, we pressure test the 6.6 Duramax cylinder heads with 40 PSI pressure to make sure there are no leaks. Then we send it through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads.\u003cbr\u003e\u003cstrong\u003eWe measure the following specs by use of profilometer:\u003c\/strong\u003e\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e\u003cbr\u003eBe sure that the surface of the block is inspected and cleaned prior to installation of this Cylinder Head.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003eWarranty:\u003cbr\u003e6 Months warranty on Cylinder heads. Parts warranty only.\u003c\/p\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\/choate-duramax-cylinder-heads.oembed","provider":"choateperformance","version":"1.0","type":"link"}