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When pushing your engine beyond 4
Replace your worn or damaged primary belt tensioner in your 08-10 6
Gussets provide strength and support to the top flange
Economy Series
4-inch intake velocity stack which will support/cool 600hp-750hp
2008-2010 Powerstroke 6.4L P1 4" Downpipe Back Exhaust System - No Muffler (C6254PLM) 2001 - 2004 GM Injectors When pushing your engine beyond2008 2010 Powerstroke 6. 4L P1 4" Downpipe Back Exhaust System No Muffler (C6254PLM) Built from Heavy Duty Aluminized Steel, the P1 Performance Products C6254PLM 4" Downpipe Back Exhaust offers a value price without having to compromise on the quality built into every component. While the seams are a major point of rust through with some budget systems, P1 Performance Products utilizes fully sealed tubing which will add years of life to your system.