aFe Mach Force XP Exhaust System Race Pipe for  GM Duramax LMM 07.5-10 V8-6.6L (td) Constructed of mandrel 409 stainless steel with OE style hangers and clamps Provides maximum flow for increased horsepower, torque and throttle response Increased air flow lowers exhaust gas temperature and improves miles per gallon All hardware and components are included for a no-trouble installation This exhaust fits the extended cab short bed Duramax LMM models only