{"title":"Cylinder Heads - GM","description":"","products":[{"product_id":"stage-0-cylinder-head-gm-6-6l-duramax-2001-2004-lb7-california-110100001","title":"STAGE 0 Aluminum Cylinder Head - GM 6.6L Duramax 2002-2004 LB7 CALIFORNIA","description":"\u003cp\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; color: #d3222a;\"\u003e\u003cspan style=\"color: #000000;\"\u003eFeatures a stock rebuild with refurbished using original GM parts. Heads are pressure tested, and a valve job is done.\u003c\/span\u003e\u003cem\u003e\u003cbr\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; color: #d3222a;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif;\" data-mce-style=\"font-family: arial, helvetica, sans-serif;\"\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e Custom builds available. Call us at (725) 238-2002 to discuss your project needs before placing order.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":42081741013235,"sku":"110100001","price":1157.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/STAGE-0-Cylinder-Head-GM-6.6L-Duramax-2001-2004-LB7-CALIFORNIA-Pacific-Performance-Engineering-613163.jpg?v=1715212986"},{"product_id":"stage-0-cylinder-head-gm-6-6l-duramax-2006-2007-lbz-110100003","title":"STAGE 0 Cylinder Head - GM 6.6L Duramax 2006-2007 LBZ (110100003)","description":"\u003cp\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; color: #d3222a;\"\u003e\u003cspan style=\"color: #000000;\"\u003eFeatures a stock rebuild with refurbished using original GM parts. Heads are pressure tested, and a valve job is done.\u003c\/span\u003e\u003cem\u003e\u003cbr\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; color: #d3222a;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif;\" data-mce-style=\"font-family: arial, helvetica, sans-serif;\"\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e Custom builds available. Call us at (725) 238-2002 to discuss your project needs before placing order.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":42081741635827,"sku":"110100003","price":1157.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/STAGE-0-Cylinder-Head-GM-6.6L-Duramax-2006-2007-LBZ-_110100003_-Pacific-Performance-Engineering-613392.jpg?v=1715212992"},{"product_id":"stage-1-cylinder-head-gm-6-6l-duramax-2007-5-2010-lmm-110100014","title":"2007.5-2010 GM 6.6L Duramax STAGE 1 Cylinder Head - GM 6.6L Duramax","description":"\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"\u003eThese heads have a 5 angle valve job, are 5 axis CNC ported including radiusing the intake ports, and include titanium retainers, new spring cup bases, beehive valve springs with higher spring pressure, and new valve stem seals. These flow 35 CFM more than stock heads on the intake and exhaust ports.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif;\" data-mce-style=\"font-family: arial, helvetica, sans-serif;\"\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e Custom builds available. Call us at (725) 238-2002 to discuss your project needs before placing order.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":42081745633523,"sku":"110100014","price":3399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/2007.5-2010-GM-6.6L-Duramax-STAGE-1-Cylinder-Head-GM-6.6L-Duramax-Pacific-Performance-Engineering-613859.jpg?v=1715213007"},{"product_id":"stage-2-cylinder-head-gm-6-6l-duramax-2001-2004-lb7-110100020","title":"2001-2004 GM 6.6L Duramax STAGE 2 Cylinder Head","description":"\u003cp style=\"text-align: justify;\" data-mce-style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif;\" data-mce-style=\"font-family: arial, helvetica, sans-serif;\"\u003eIncludes everything in Stage 1 and also has larger exhaust and intake valves, bronze valve guides, larger valve seats, and larger spring cup bases to accommodate the larger valves. These flow 75 CFM more than stock heads on the intake and exhaust ports.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" data-mce-style=\"text-align: justify;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif;\" data-mce-style=\"font-family: arial, helvetica, sans-serif;\"\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e Custom builds available. Call us at (725) 238-2002 to discuss your project needs before placing order.\u003c\/span\u003e\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":42081746321651,"sku":"110100020","price":5299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/2001-2004-GM-6.6L-Duramax-STAGE-2-Cylinder-Head-Pacific-Performance-Engineering-614062.jpg?v=1715213014"},{"product_id":"valve-springs-retainers-keepers-kit-complete-kit","title":"2001-2016 GM 6.6L Duramax Conical Valve Springs, Retainers, and Keepers Kit","description":"\u003cp\u003eUpgraded conical spring kit for the 2001-2016 GM 6.6L Duramax. The conical valve springs with higher spring rate and the lighter weight of valve train components result in sharper response and eliminate valve float under high engine RPMs. These stiffer springs have an installed pressure of 125 pounds and handle 60+ psi of boost.\u003c\/p\u003e\n\u003cp\u003eThe spring retainers and seats are made of high-strength chromoly steel to handle the increased spring pressure. The FKM valve seals are tailored to the Cast Iron Heads’ valve guides for a tight seal.\u003c\/p\u003e\n\u003cp\u003eEach kit services two complete cylinder heads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32 springs\u003c\/li\u003e\n\u003cli\u003e32 spring retainers\u003c\/li\u003e\n\u003cli\u003e32 spring seats\u003c\/li\u003e\n\u003cli\u003e32 sets of keepers\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":42832926540019,"sku":"110090050","price":599.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/products\/2001-2016-GM-6.6L-Duramax-Valve-Springs_-Retainers_-and-Keepers-Complete-Kit-Pacific-Performance-Engineering-810213.jpg?v=1774801980"},{"product_id":"valve-and-valve-spring-kit-complete","title":"2001-2016 GM 6.6L Duramax Valve and Conical Spring Kit","description":"\u003cp\u003eUpgraded conical spring and valve kit for the 2001-2016 GM 6.6L Duramax. The conical valve springs with higher spring rate and the lighter weight of valve train components result in sharper response and eliminate valve float under high engine RPMs. These stiffer springs have an installed pressure of 125 pounds and handle 60+ psi of boost. All valves are fully nitridated and Stellite-Alloy-reinforced for superior durability and reliability.\u003c\/p\u003e\n\u003cp\u003eThe spring retainers and seats are made of high-strength chromoly steel to handle the increased spring pressure. The FKM valve seals are tailored to the Cast Iron Heads’ valve guides for a tight seal.\u003c\/p\u003e\n\u003cp\u003eEach kit services two complete cylinder heads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e16 intake valves\u003c\/li\u003e\n\u003cli\u003e16 exhaust valves\u003c\/li\u003e\n\u003cli\u003e32 springs\u003c\/li\u003e\n\u003cli\u003e32 spring retainers\u003c\/li\u003e\n\u003cli\u003e32 spring seats\u003c\/li\u003e\n\u003cli\u003e32 sets of keepers\u003c\/li\u003e\n\u003cli\u003e32 valve seals\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":42832926572787,"sku":"110090080","price":899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/products\/2001-2016-GM-6.6L-Duramax-Valve-and-Spring-Kit-Pacific-Performance-Engineering-810557.jpg?v=1774801988"},{"product_id":"duramax-cast-iron-cylinder-head-lb7-one-2001-2004-gm-6-6l","title":"2001-2004 GM 6.6L Duramax Cast Iron Cylinder Head (One) LB7","description":"\u003ch2\u003eDuramax Cast Iron Cylinder Head (One) LB7\u003c\/h2\u003e\n\u003cp\u003eThe OEM Duramax cast-aluminum cylinder heads fall short over time - the different heat expansion rates between cast-iron engine block and cast-aluminum cylinder head cause head gasket scrubbing, and eventually blown head gaskets. The aluminum cylinder heads are also prone to warping, melting and\/or cracking in high-performance applications where excessive heat is introduced.\u003c\/p\u003e\n\u003cp\u003ePPE’s Cast Iron Cylinder Head is the ultimate upgrade to your Duramax engine and eliminates any head gasket or cracking concerns. Cast from high quality alloyed grey iron, the PPE Cylinder Head offers elevated fatigue strength, heat and creep resistance, which prolongs the cylinder head’s lifespan significantly. PPE Cylinder Heads also share the same heat expansion rate as the stock cast-iron cylinder block – no more blown head gaskets. PPE LB7 Cylinder Heads also features cast-in fuel injector cups and solves the OEM injector cup leaking issue.\u003c\/p\u003e\n\u003cp\u003eEach head comes complete with upgraded valve train components. All valves are made of superior materials and fully nitridated. The valve springs feature higher spring rate, lighter retainers\/locators, enabling faster response during higher RPMs. Alloy valve seats provide superior wear and heat resistance. The denser and stiffer material properties from the cast-iron construction also significantly reduce engine clatter. Whether you have a damaged aluminum cylinder head or a desire for better reliability and longevity on your Duramax engine, the PPE Cast Iron Cylinder Head is undoubtedly the best choice.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/110100100_Cast-In-Injector-Cups.jpg?v=1754092098\" alt=\"Duramax Cast Iron Cylinder Head (One) LB7\" width=\"700\"\u003e\u003c\/p\u003e\n\u003cp\u003eCNC-Ported version SKU 110100111 also available No-Valve-Seat-Pocket version SKU 110100061 also available (for applications requiring a custom valve job)\u003c\/p\u003e\n\u003cp\u003eDuramax Iron Heads Upgrade: Diesel World Unboxing PPEs new Duramax cylinder heads!: LinCo Diesel Performance\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/110100100_Cast-In-Injector-Cups_2.jpg?v=1754092098\" alt=\"Duramax Cast Iron Cylinder Head (One) LB7\" width=\"700\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/www.dieselworldmag.com\/diesel-engines\/duramax-iron-heads-upgrade\/\" title=\"Duramax Iron Heads Upgrade: Diesel World\" target=\"_blank\"\u003e\u003cstrong\u003eDuramax Iron Heads Upgrade: Diesel World \u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/DW-2208-GMTECH-01-800x430_480x480.jpg?v=1662478784\" alt=\"Duramax Cast Iron Cylinder Head (One) LB7\" width=\"381\" height=\"205\"\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"style-scope ytd-watch-metadata\"\u003e\u003cspan style=\"color: #18ae3c;\"\u003e\u003cstrong\u003e\u003ca style=\"color: #18ae3c;\" href=\"https:\/\/youtu.be\/dIPUmnMjORI\" title=\"Unboxing PPEs new Duramax cylinder heads! : LinCo Diesel Performance\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eUnboxing PPEs new Duramax cylinder heads!: LinCo Diesel Performance\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline; color: #16ac3a;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/LinCoDieselPeformance-PPECylinderHeads_480x480.jpg?v=1684447948\" alt=\"Duramax Cast Iron Cylinder Head (One) LB7\" width=\"384\" height=\"218\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":42832926900467,"sku":"110100101","price":1499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/products\/2001-2004-GM-6.6L-Duramax-Cast-Iron-Cylinder-Head-_One_-LB7-Pacific-Performance-Engineering-811727.jpg?v=1774802009"},{"product_id":"duramax-cast-iron-cylinder-head-one-lly-lbz-lmm-2004-5-2010-gm-6-6l","title":"2004.5-2010 GM 6.6L Duramax Cast Iron Cylinder Head (One) LLY\/LBZ\/LMM","description":"\u003ch2\u003eDuramax Cast Iron Cylinder Head\u003c\/h2\u003e\n\u003cp\u003eThe OEM Duramax cast-aluminum cylinder heads fall short over time - the different heat expansion rates between cast-iron engine block and cast-aluminum cylinder head cause head gasket scrubbing, and eventually blown head gaskets. The aluminum cylinder heads are also prone to warping, melting and\/or cracking in high-performance applications where excessive heat is introduced.\u003c\/p\u003e\n\u003cp\u003ePPE’s Cast Iron Cylinder Head is the ultimate upgrade to your Duramax engine and eliminates any head gasket or cracking concerns. Cast from high quality alloyed grey iron, the PPE Cylinder Head offers elevated fatigue strength, heat and creep resistance, which prolongs the cylinder head’s lifespan significantly. PPE Cylinder Heads also share the same heat expansion rate as the stock cast-iron cylinder block – no more blown head gaskets.\u003c\/p\u003e\n\u003cp\u003eEach head comes complete with upgraded valve train components. All valves are made of superior materials and fully nitridated. The valve springs feature higher spring rate, lighter retainers\/locators, enabling faster response during higher RPMs. Alloy valve seats provide superior wear and heat resistance. The denser and stiffer material properties from the cast-iron construction also significantly reduce engine clatter.  \u003c\/p\u003e\n\u003cp\u003eWhether you have a damaged aluminum cylinder head or a desire for better reliability and longevity on your Duramax engine, the PPE Cast Iron Cylinder Head is undoubtedly the best choice.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"#\"\u003e\u003cstrong\u003eRequires the use of LBZ\/LMM glow plugs on LLY engines\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/www.dieselworldmag.com\/diesel-engines\/duramax-iron-heads-upgrade\/\" title=\"Duramax Iron Heads Upgrade: Diesel World\" target=\"_blank\"\u003e\u003cstrong\u003eDuramax Iron Heads Upgrade: Diesel World \u003cbr\u003e\u003cimg height=\"205\" width=\"381\" alt=\"Duramax Cast Iron Cylinder Head\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/DW-2208-GMTECH-01-800x430_480x480.jpg?v=1662478784\"\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":42832926998771,"sku":"110100103","price":1499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/products\/2004.5-2010-GM-6.6L-Duramax-Cast-Iron-Cylinder-Head-_One_-LLY-LBZ-LMM-Pacific-Performance-Engineering-812590.jpg?v=1774802022"},{"product_id":"duramax-cast-iron-cylinder-head-one-lml-2011-2016-gm-6-6l","title":"2011-2016 GM 6.6L Duramax Cast Iron Cylinder Head (One) LML","description":"\u003ch2\u003eDuramax Cast Iron Cylinder Head (One) LML\u003c\/h2\u003e\n\u003cp\u003eThe OEM Duramax cast-aluminum cylinder heads fall short over time - the different heat expansion rates between cast-iron engine block and cast-aluminum cylinder head cause head gasket scrubbing and eventually blown head gaskets. The aluminum cylinder heads are also prone to warping, melting and\/or cracking in high-performance applications where excessive heat is introduced.\u003c\/p\u003e\n\u003cp\u003ePPE’s Cast Iron Cylinder Head is the ultimate upgrade to your Duramax engine and eliminates any head gasket or cracking concerns. Cast from high quality alloyed grey iron, the PPE Cylinder Head offers elevated fatigue strength, heat and creep resistance, which prolongs the cylinder head’s lifespan significantly. PPE Cylinder Heads also share the same heat expansion rate as the stock cast-iron cylinder block – no more blown head gaskets.\u003c\/p\u003e\n\u003cp\u003eEach head comes complete with upgraded valve train components. All valves are made of superior materials and fully nitridated. The valve springs feature higher spring rate, lighter retainers\/locators, enabling faster response during higher RPMs. Alloy valve seats provide superior wear and heat resistance. The denser and stiffer material properties from the cast-iron construction also significantly reduce engine clatter. Whether you have a damaged aluminum cylinder head or a desire for better reliability and longevity on your Duramax engine, the PPE Cast Iron Cylinder Head is undoubtedly the best choice.\u003c\/p\u003e\n\u003cp\u003eCNC-Ported version SKU 110100115 also available\u003c\/p\u003e\n\u003cp\u003eDuramax Iron Heads Upgrade: Diesel World Unboxing PPEs new Duramax cylinder heads!: LinCo Diesel Performance\u003cbr\u003e\u003cbr\u003e\u003ca title=\"Duramax Iron Heads Upgrade: Diesel World\" href=\"https:\/\/www.dieselworldmag.com\/diesel-engines\/duramax-iron-heads-upgrade\/\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eDuramax Iron Heads Upgrade: Diesel World \u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/DW-2208-GMTECH-01-800x430_480x480.jpg?v=1662478784\" alt=\"Duramax Cast Iron Cylinder Head (One) LML\" width=\"500\"\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"style-scope ytd-watch-metadata\"\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/youtu.be\/dIPUmnMjORI\" title=\"Unboxing PPEs new Duramax cylinder heads! : LinCo Diesel Performance\"\u003eUnboxing PPEs new Duramax cylinder heads!: LinCo Diesel Performance\u003c\/a\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/LinCoDieselPeformance-PPECylinderHeads_480x480.jpg?v=1684447948\" alt=\"Duramax Cast Iron Cylinder Head (One) LML\" width=\"500\"\u003e\u003c\/p\u003e","brand":"MGP Racing","offers":[{"title":"Default Title","offer_id":42832927195379,"sku":"110100105","price":1499.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/2011-2016-GM-6.6L-Duramax-Cast-Iron-Cylinder-Head-_One_-LML-Pacific-Performance-Engineering-813355.jpg?v=1774802036"},{"product_id":"freeze-plug-22mm-od","title":"Small Freeze Plug (22mm) for 2004.5-2016 PPE Cast Iron Heads","description":"\u003cp\u003eSmall cylinder head freeze plug with 22mm diameter. Compatible with 2004.5-2016 PPE cast iron cylinder heads.\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":43723904876787,"sku":"500209022","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/Freeze-Plug-22mm-PPE-Heads-2004-5-2016-500209022_01.jpg?v=1758323832"},{"product_id":"freeze-plug-cylinder-head-20mm-ppe-heads-2001-2004","title":"Small Freeze Plug (20mm) for 2001-2004 PPE Cast Iron Heads and 2001-2016 OEM Aluminum Heads","description":"\u003cp\u003eSmall cylinder head freeze plug with 20mm diameter. Compatible with both 2001–2004 PPE cast iron cylinder heads and 2001-2016 GM cylinder heads.\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":43730090393843,"sku":"500209020","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/Freeze-Plug-20mm-PPE-Heads-2001-2004-500209020_02.jpg?v=1758324375"},{"product_id":"freeze-plug-28mm-all-heads-2001-2016","title":"Large Freeze Plug (28mm) for 2001-2016 PPE Cast Iron Heads and 2001-2016 OEM Heads","description":"\u003cp\u003eLarge cylinder head freeze plug with 28mm diameter. Compatible with both 2001-2016 PPE Cast Iron Heads and 2001-2016 OEM Heads\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":43730090492147,"sku":"500209028","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/Freeze-Plug-28mm-PPE-Heads-2001-2016-500209028_01.jpg?v=1758525968"},{"product_id":"duramax-ported-cast-iron-cylinder-head-2001-2004-gm-6-6l-one-lb7","title":"2001-2004 GM 6.6L Duramax CNC Ported Cast Iron Cylinder Head (One Head) LB7","description":"\u003ch2\u003eDuramax Ported Cast Iron Cylinder Head - 2001-2004 GM 6.6L (One Head) LB7\u003c\/h2\u003e\n\u003cp\u003eThe OEM Duramax cast-aluminum cylinder heads fall short over time – the differing heat expansion rates between the cast-iron engine block and cast-aluminum cylinder head cause head gasket scrubbing and eventually blown head gaskets. The aluminum cylinder heads are also prone to warping, melting, and\/or cracking in high-performance applications where excessive heat is introduced.\u003c\/p\u003e\n\u003cp\u003ePPE’s new ported LB7 Cast Iron Cylinder Head is the ultimate upgrade for your Duramax engine, eliminating any concerns about head gaskets or cracking. Cast from high-quality alloyed gray iron, the PPE Cylinder Head offers superior fatigue strength, heat resistance, and creep resistance, significantly prolonging its lifespan. The cast-iron material also shares the same heat expansion rate as the stock engine block, eliminating blown head gaskets. Additionally, the PPE Cylinder Head features cast-in fuel injector cups, solving the OEM injector cup leaking issue.\u003c\/p\u003e\n\u003cp\u003eOur CNC porting process improves airflow, enhancing power, fuel efficiency, and throttle response while reducing engine stress and turbo lag. By smoothing the ports and maintaining wall thickness, these heads provide increased horsepower and torque without sacrificing reliability. Tailored to each specific head, the CNC machining compensates for casting variations, ensuring consistent and optimized airflow dynamics. Whether you have a damaged aluminum cylinder head or seek better reliability and longevity for your Duramax engine, the PPE Cast Iron Cylinder Head is undoubtedly the best choice.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e*Important Note:\u003c\/strong\u003e The valve seats of the PPE Heavy Cast Iron Cylinder Heads are installed with an interference that maximizes the durability and lifespan of the cylinder heads. Such interference might not be optimal for extreme-performance applications where a significant amount of heat is created. For those applications, PPE suggests that the exhaust valve seats be replaced with higher interference (+0.006'' to +0.008'') oversized exhaust valve seats (Nominal size 34mm).\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":46190702592243,"sku":"110100111","price":1899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/110100111_CastIronCylinderHead_1.jpg?v=1726178120"},{"product_id":"duramax-ported-cast-iron-cylinder-head-2004-5-2010-gm-6-6l-one-lly-lbz-lmm","title":"2004.5-2010 GM 6.6L Duramax CNC Ported Cast Iron Cylinder Head (One Head) LLY\/LBZ\/LMM","description":"\u003ch2\u003eDuramax Ported Cast Iron Cylinder Head - 2004.5-2010 GM 6.6L (One) LLY\/LBZ\/LMM\u003c\/h2\u003e\n\u003cp\u003eThe OEM Duramax cast-aluminum cylinder heads fall short over time - the different heat expansion rates between cast-iron engine block and cast-aluminum cylinder head cause head gasket scrubbing, and eventually blown head gaskets. The aluminum cylinder heads are also prone to warping, melting, and\/or cracking in high-performance applications where excessive heat is introduced.\u003c\/p\u003e\n\u003cp\u003ePPE’s new ported Cast Iron Cylinder Head is the ultimate upgrade to your Duramax engine and eliminates any head gasket or cracking concerns. Cast from high-quality alloyed gray iron, the PPE Cylinder Head offers elevated fatigue strength, heat, and creep resistance, which prolongs the cylinder head’s lifespan significantly. PPE Cylinder Head also shares the same heat expansion rate as the stock cast-iron cylinder block – no more blown head gaskets.\u003c\/p\u003e\n\u003cp\u003eOur CNC porting process improves airflow, enhancing power, fuel efficiency, and throttle response while reducing engine stress and turbo lag. By smoothing the ports and maintaining wall thickness, these heads provide increased horsepower and torque without sacrificing reliability. Tailored to each specific head, the CNC machining compensates for casting variations, ensuring consistent and optimized airflow dynamics. Whether you have a damaged aluminum cylinder head or a desire for better reliability and longevity on your Duramax engine, the PPE Cast Iron Cylinder Head is undoubtedly the best choice. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e*Important Note:\u003c\/strong\u003e The valve seats of the PPE Heavy Cast Iron Cylinder Heads are installed with an interference that maximizes the durability and lifespan of the cylinder heads. Such interference might not be optimal for extreme-performance applications where a significant amount of heat is created. For those applications, PPE suggests that the exhaust valve seats be replaced with higher interference (+0.006'' to +0.008'') oversized exhaust valve seats (Nominal size 34mm).\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"#\"\u003e\u003cstrong\u003eRequires the use of LBZ\/LMM glow plugs on LLY engines\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":46238502781171,"sku":"110100113","price":1899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/Cylinder-Head-Cast-Iron-GM_6-6L-Duramax-2004-5-2010_LLY-LBZ-LMM_Ported.jpg?v=1727912625"},{"product_id":"gasket-thermostat-housing-to-cylinder-head-97223686","title":"2001-2016 GM Coolant Thermostat Bridge Housing to Cylinder Head Gasket","description":"\u003cp\u003e301 Stainless Steel thermostat housing to cylinder head gasket for 2001-2016 GM 6.6L Duramax engine. Two gaskets required per engine.\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":47778157887731,"sku":"119000502","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/119000502-PL-Thermostat-housing-to-cylinder-head-2.jpg?v=1758326457"},{"product_id":"cylinder-head-bare-lly-lbz-lmm-cast-iron-no-valve-seat-machining","title":"2004.5-2010 GM 6.6L Duramax Cast Iron Cylinder Head (One) LLY\/LBZ\/LMM – No Seats or Valves","description":"\u003cp\u003eLB7 cast iron cylinder head with no valvetrain components or valve seats. It requires a custom valve job applied either directly to the cast iron surface or pocket machining with desired tolerances for the intake and exhaust valve seats being used. It does not come with valves, springs, or locks. Valve guides and freeze plugs are included.\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":47778158149875,"sku":"110100063","price":899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/Cylinder-Head-Bare-LLY-LBZ-LMM-Cast-Iron_110100063_4.jpg?v=1758570436"},{"product_id":"duramax-valve-stem-seal-kit-16x-for-2001-2010-gm-6-6l","title":"GM 6.6L Duramax Valve Stem Seal Kit (16x)","description":"\u003ch2\u003eDuramax Valve Stem Seal Kit (16x) for GM 6.6L\u003c\/h2\u003e\n\u003cp\u003eOEM-style FKM valve stem seal kit that's compatible with 2001-2010 OEM aluminum cylinder heads and 2001-2016 PPE Cast Iron Cylinder Heads. Each kit includes 16x seals to service one cylinder head.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cbr\u003eNot compatible with 2011-2016 LML OEM aluminum cylinder heads.\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":49301339406579,"sku":"110090016","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/Valve-Stem-Seal-Kit_110090016_01.jpg?v=1782509121"}],"url":"https:\/\/ppepower.com\/en-au\/collections\/cylinder-heads-gm.oembed?page=2","provider":"Pacific Performance Engineering","version":"1.0","type":"link"}