Interested in a new exhaust system for your 6.7L Cummins? Check out the MACH Force XP DPF-Back exhaust system by aFe. This system is constructed from 5" mandrel-bent 409 stainless steel tubing and uses high quality band clamps and OE-style bayonet hangers. This unit uses all factory mounting locations to provide a quick, hassle-free installation. MACH Force XP exhaust systems are the perfect combination of performance, fit and value.Simple Installation:All systems use factory mounting locations providing stability and hassle-free installation.Leak-Free Seal:High quality OE-style flange and band clamps are used for a complete 360 degree sealing surface.OE Fit:OE-style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions. The bayonet tip holds the hanger bushing in place for an OE-style fit that does not change with time.Flow and Performance:This Mach FORCE XP exhaust system is constructed of 5" mandrel-bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGT’s.