Fits Only Extended Cab Short Bed
The LARGE Bore HD race pipe upgrade kit is constructed of mandrel bent 409 stainless steel with OE style hangers and clamps. This 4" race pipe provides maximum flow for increased horsepower, torque and throttle response. The increased air flow also lowers EGT's and helps improve MPG. All hardware and components are included for a no-trouble installation. This exhaust fits the Extended Cab Short Bed Duramax LMM models only.
Note: This is a "Race Only" product used solely for competition. It's use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use including recreational off-road use, could be in violation of local, state and federal laws. This system also requires an aftermarket electronic module to work properly with the vehicle.
All aFe exhaust systems are engineered and manufactured in our Corona, California manufacturing facility.