{"title":"Choate | Cummins Cylinder Heads","description":"","products":[{"product_id":"5-9-12v-cummins-daily-driver-cylinder-head-reman-choate-performance","title":"5.9 12V Cummins Daily Driver Cylinder Head Reman Choate Performance","description":"\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\u003eRemanufactured Casting: 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\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\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:\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 5.9L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186816160048,"sku":"CEP59C12VDHR","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/5.9Cummins12vCylinderHead_3ad86a5d-697c-4e4f-8105-ebefb801642b.png?v=1780507136"},{"product_id":"5-9-12v-cummins-workhorse-cylinder-head-reman-choate-performance","title":"5.9 12V Cummins Workhorse Cylinder Head Reman Choate Performance","description":"\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\u003eRemanufactured Casting: 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\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\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 5.9L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186816192816,"sku":"CEP59C12VWHR","price":1899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/5.9Cummins12vWorkhorseCylinderHead_2.png?v=1775232916"},{"product_id":"5-9-12v-cummins-workhorse-plus-cylinder-head-reman-choate-performance","title":"5.9 12V Cummins Workhorse Plus Cylinder Head Reman Choate Performance","description":"\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\u003eRemanufactured Casting: 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\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\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\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 5.9L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186816225584,"sku":"CEP59C12VWPHR","price":2800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/5.9Cummins12vWorkhorseCylinderHead_2.png?v=1775232916"},{"product_id":"5-9-24v-cummins-2003-2007-cr-daily-driver-cylinder-head-reman-choate-performance","title":"5.9 24V Cummins 2003-2007 CR Daily Driver Cylinder Head Reman Choate Performance","description":"\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\u003eRemanufactured Casting: 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\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\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:\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 5.9L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186816258352,"sku":"CEP59C24CDHR","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.7CumminsDDCylinderHead.png?v=1780499967"},{"product_id":"5-9-24v-cummins-2003-2007-cr-workhorse-cylinder-head-reman-choate-performance","title":"5.9 24V Cummins 2003-2007 CR Workhorse Cylinder Head Reman Choate Performance","description":"\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\n\u003ch3\u003eComponents and Parts:\u003c\/h3\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\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\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\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 5.9L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186816291120,"sku":"CEP59C24CWHR","price":1899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/5.9CumminsCRWH1.png?v=1780497481"},{"product_id":"5-9-24v-cummins-2003-2007-cr-workhorse-plus-cylinder-head-reman-choate-performance","title":"5.9 24V Cummins 2003-2007 CR Workhorse Plus Cylinder Head Reman Choate Performance","description":"\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\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRemanufactured Casting: 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\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\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\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 5.9L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186816356656,"sku":"CEP59C24CWPHR","price":2900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/5.9CumminsCRWH1.png?v=1780497481"},{"product_id":"5-9-24v-cummins-1998-5-2002-vp-daily-driver-cylinder-head-reman-choate-performance","title":"5.9 24V Cummins 1998.5-2002 VP Daily Driver Cylinder Head Reman Choate Performance","description":"\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\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRemanufactured Casting: 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\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\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\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 5.9L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186816389424,"sku":"CEP59C24VDHR","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/5.9CumminsDDCylinderHead.png?v=1780500382"},{"product_id":"5-9-24v-cummins-1998-5-2002-vp-workhorse-cylinder-head-reman-choate-performance","title":"5.9 24V Cummins 1998.5-2002 VP Workhorse Cylinder Head Reman Choate Performance","description":"\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\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRemanufactured Casting: 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\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\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 5.9L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186816454960,"sku":"CEP59C24VWHR","price":1899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/5.9CumminsVPWH1.png?v=1780497343"},{"product_id":"5-9-24v-cummins-1998-5-2002-vp-workhorse-plus-cylinder-head-reman-choate-performance","title":"5.9 24V Cummins 1998.5-2002 VP Workhorse Plus Cylinder Head Reman Choate Performance","description":"\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\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRemanufactured Casting: 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\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\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\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\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\u003ch4\u003eMachining Process:\u003c\/h4\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 5.9L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186816618800,"sku":"CEP59C24VWPHR","price":2900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/5.9CumminsVPWH1.png?v=1780497343"},{"product_id":"6-7-cummins-daily-driver-cylinder-head-reman-choate-performance","title":"6.7 Cummins Daily Driver Cylinder Head Reman Choate Performance","description":"\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\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\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\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\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\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 6.7L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817077552,"sku":"CEP67CDHR","price":1799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.7CumminsDDCylinderHead.png?v=1780499967"},{"product_id":"6-7-cummins-workhorse-cylinder-head-reman-choate-performance","title":"6.7 Cummins Workhorse Cylinder Head Reman Choate Performance","description":"\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\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\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\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\u003e \u003c\/p\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\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 6.7L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817143088,"sku":"CEP67CWHR","price":2100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.7CumminsWHCylinderHead_2.png?v=1780503584"},{"product_id":"6-7-cummins-workhorse-plus-cylinder-head-reman-choate-performance","title":"6.7 Cummins Workhorse Plus Cylinder Head Reman Choate Performance","description":"\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\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\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\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\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\u003e \u003c\/p\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\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\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\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications and features to address common failure points of the factory 6.7L Cummins 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","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":50186817175856,"sku":"CEP67CWPHR","price":2900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6.7CumminsWHCylinderHead_2.png?v=1780503584"}],"url":"https:\/\/choateperformance.com\/collections\/choate-cummins-cylinder-heads.oembed","provider":"choateperformance","version":"1.0","type":"link"}