{"id":9970412093680,"title":"2007.5-2010 GM 6.6L Duramax STAGE 1 Cylinder Head - GM 6.6L Duramax","handle":"stage-1-cylinder-head-gm-6-6l-duramax-2007-5-2010-lmm-110100014","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","published_at":"2026-04-04T18:20:46-07:00","created_at":"2026-04-04T18:20:46-07:00","vendor":"Pacific Performance Engineering","type":"","tags":["2007-chevrolet-silverado-2500hd-8-cyl-6-6-liter-turbo-esi4956196","2007-chevrolet-silverado-2500hd-classic-8-cyl-6-6-liter-turbo-esi5695775","2007-chevrolet-silverado-3500-classic-8-cyl-6-6-liter-turbo-esi7760659","2007-chevrolet-silverado-3500hd-8-cyl-6-6-liter-turbo-esi7529828","2007-gmc-sierra-2500hd-8-cyl-6-6-liter-turbo-esi6749266","2007-gmc-sierra-2500hd-classic-8-cyl-6-6-liter-turbo-esi6166156","2007-gmc-sierra-3500-classic-8-cyl-6-6-liter-turbo-esi9783832","2007-gmc-sierra-3500hd-8-cyl-6-6-liter-turbo-esi2650510","2008-chevrolet-silverado-2500hd-8-cyl-6-6-liter-turbo-esi9645645","2008-chevrolet-silverado-3500hd-8-cyl-6-6-liter-turbo-esi4987957","2008-gmc-sierra-2500hd-8-cyl-6-6-liter-turbo-esi8434654","2008-gmc-sierra-3500hd-8-cyl-6-6-liter-turbo-esi2209519","2009-chevrolet-silverado-2500hd-8-cyl-6-6-liter-turbo-esi3942607","2009-chevrolet-silverado-3500hd-8-cyl-6-6-liter-turbo-esi7082592","2009-gmc-sierra-2500hd-8-cyl-6-6-liter-turbo-esi9736247","2009-gmc-sierra-3500hd-8-cyl-6-6-liter-turbo-esi2246196","2010-chevrolet-silverado-2500hd-8-cyl-6-6-liter-turbo-esi1097900","2010-chevrolet-silverado-3500hd-8-cyl-6-6-liter-turbo-esi8064240","2010-gmc-sierra-2500hd-8-cyl-6-6-liter-turbo-esi5606102","2010-gmc-sierra-3500hd-8-cyl-6-6-liter-turbo-esi2762403","Cylinder Head","GM"],"price":339999,"price_min":339999,"price_max":339999,"available":true,"price_varies":false,"compare_at_price":0,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":49501375561968,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"110100014","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"2007.5-2010 GM 6.6L Duramax STAGE 1 Cylinder Head - GM 6.6L Duramax","public_title":null,"options":["Default Title"],"price":339999,"weight":36650,"compare_at_price":0,"inventory_quantity":0,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/www.hitechclassics.com\/cdn\/shop\/files\/2007.5-2010-GM-6.6L-Duramax-STAGE-1-Cylinder-Head-GM-6.6L-Duramax-Pacific-Performance-Engineering-613859.jpg?v=1775352049"],"featured_image":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2007.5-2010-GM-6.6L-Duramax-STAGE-1-Cylinder-Head-GM-6.6L-Duramax-Pacific-Performance-Engineering-613859.jpg?v=1775352049","options":["Title"],"media":[{"alt":null,"id":44161402568944,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2007.5-2010-GM-6.6L-Duramax-STAGE-1-Cylinder-Head-GM-6.6L-Duramax-Pacific-Performance-Engineering-613859.jpg?v=1775352049"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2007.5-2010-GM-6.6L-Duramax-STAGE-1-Cylinder-Head-GM-6.6L-Duramax-Pacific-Performance-Engineering-613859.jpg?v=1775352049","width":1200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\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"}