{"id":9970435162352,"title":"2004.5-2010 GM 6.6L Duramax High-Flow 304 Stainless Steel Down Pipe","handle":"high-flow-304-stainless-steel-down-pipe-gm-6-6l-duramax-2004-half-2010","description":"\u003ch2\u003eHigh-Flow 304 Stainless Steel Down Pipe\u003c\/h2\u003e\n\u003cp\u003eThe factory LLY\/LBZ\/LMM down pipe makes an abrupt directional change immediately after the turbine flange, which restricts exhaust flow and impedes performance. Additionally, the indentations in the piping further obstruct exhaust flow.\u003c\/p\u003e\n\u003cp\u003eUpgrade your Duramax with the PPE Free-Flow Downpipe and eliminate the rusted, restrictive factory design. The PPE Down Pipe highlights unrestricted 3-inch diameter flow path all-along, cast stainless-steel upper and lower flanges with CNC machined mating surfaces, and three-inch 304 stainless steel mid-section. It ensures smooth transitions for unobstructed exhaust flow. To further enhance performance, it comes with a woven titanium sleeve that effectively insulates heat, protecting the engine bay.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM P\/N for reference:\u003c\/strong\u003e GM 98050150\u003c\/p\u003e","published_at":"2026-04-04T18:41:09-07:00","created_at":"2026-04-04T18:41:09-07:00","vendor":"MGP Racing","type":"EXHAUST","tags":["2004-chevrolet-silverado-2500-hd-lly-8-cyl-6-6-liter-esr1301384","2004-chevrolet-silverado-2500hd-lly-8-cyl-6-6-liter-turbo-esr7824846","2004-gmc-sierra-2500hd-lly-8-cyl-6-6-liter-turbo-esr5894005","2004-gmc-sierra-3500hd-lly-8-cyl-6-6-liter-turbo-esr7076585","2005-chevrolet-silverado-2500hd-8-cyl-6-6-liter-turbo-esi8079105","2005-chevrolet-silverado-3500hd-8-cyl-6-6-liter-turbo-esi9612207","2005-gmc-sierra-2500hd-8-cyl-6-6-liter-turbo-esi9745976","2005-gmc-sierra-3500hd-8-cyl-6-6-liter-turbo-esi6494594","2006-chevrolet-silverado-2500hd-8-cyl-6-6-liter-turbo-esi5266480","2006-chevrolet-silverado-3500hd-8-cyl-6-6-liter-turbo-esi7547394","2006-gmc-sierra-2500hd-8-cyl-6-6-liter-turbo-esi9378369","2006-gmc-sierra-3500hd-8-cyl-6-6-liter-turbo-esi4367050","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","GM","Intake\/Turbo\/Exhaust","PRI"],"price":14999,"price_min":14999,"price_max":14999,"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":49501506896112,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"117000500","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"2004.5-2010 GM 6.6L Duramax High-Flow 304 Stainless Steel Down Pipe","public_title":null,"options":["Default Title"],"price":14999,"weight":3221,"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\/2004.5-2010-GM-6.6L-Duramax-Three-Inch-304-Stainless-Steel-Down-Pipes-Pacific-Performance-Engineering-134350238.jpg?v=1775353271","\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2010-GM-6.6L-Duramax-Three-Inch-304-Stainless-Steel-Down-Pipes-Pacific-Performance-Engineering-134349921.jpg?v=1775353271","\/\/www.hitechclassics.com\/cdn\/shop\/files\/117000500_Down-Pipe_045-10_2.jpg?v=1775353271","\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2010-GM-6.6L-Duramax-Three-Inch-304-Stainless-Steel-Down-Pipes-Pacific-Performance-Engineering-134349890.jpg?v=1775353271"],"featured_image":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2010-GM-6.6L-Duramax-Three-Inch-304-Stainless-Steel-Down-Pipes-Pacific-Performance-Engineering-134350238.jpg?v=1775353271","options":["Title"],"media":[{"alt":null,"id":44161585512688,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2010-GM-6.6L-Duramax-Three-Inch-304-Stainless-Steel-Down-Pipes-Pacific-Performance-Engineering-134350238.jpg?v=1775353271"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2010-GM-6.6L-Duramax-Three-Inch-304-Stainless-Steel-Down-Pipes-Pacific-Performance-Engineering-134350238.jpg?v=1775353271","width":1200},{"alt":null,"id":44161585545456,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2010-GM-6.6L-Duramax-Three-Inch-304-Stainless-Steel-Down-Pipes-Pacific-Performance-Engineering-134349921.jpg?v=1775353271"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2010-GM-6.6L-Duramax-Three-Inch-304-Stainless-Steel-Down-Pipes-Pacific-Performance-Engineering-134349921.jpg?v=1775353271","width":1200},{"alt":null,"id":44161585578224,"position":3,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/117000500_Down-Pipe_045-10_2.jpg?v=1775353271"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/117000500_Down-Pipe_045-10_2.jpg?v=1775353271","width":1200},{"alt":null,"id":44161585610992,"position":4,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2010-GM-6.6L-Duramax-Three-Inch-304-Stainless-Steel-Down-Pipes-Pacific-Performance-Engineering-134349890.jpg?v=1775353271"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2010-GM-6.6L-Duramax-Three-Inch-304-Stainless-Steel-Down-Pipes-Pacific-Performance-Engineering-134349890.jpg?v=1775353271","width":1200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch2\u003eHigh-Flow 304 Stainless Steel Down Pipe\u003c\/h2\u003e\n\u003cp\u003eThe factory LLY\/LBZ\/LMM down pipe makes an abrupt directional change immediately after the turbine flange, which restricts exhaust flow and impedes performance. Additionally, the indentations in the piping further obstruct exhaust flow.\u003c\/p\u003e\n\u003cp\u003eUpgrade your Duramax with the PPE Free-Flow Downpipe and eliminate the rusted, restrictive factory design. The PPE Down Pipe highlights unrestricted 3-inch diameter flow path all-along, cast stainless-steel upper and lower flanges with CNC machined mating surfaces, and three-inch 304 stainless steel mid-section. It ensures smooth transitions for unobstructed exhaust flow. To further enhance performance, it comes with a woven titanium sleeve that effectively insulates heat, protecting the engine bay.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM P\/N for reference:\u003c\/strong\u003e GM 98050150\u003c\/p\u003e"}