431017-864NM Mel’s Manufacturing 4″ Downpipe Back Delete Exhaust Duramax 11-15

11-15 Duramax 4″ Downpipe Back Exhaust by Mel’s Manufacturing are an ideal solution to pair with a race tuner and delete your diesel particulate filter (DPF) off your diesel pickup truck. You must use a tuner when removing the DPF off of the vehicle.

This pipe is the V Band Flange. If you have the 3 Bolt Flange Style please order the 15.5-16 pipe. You can see which type of flange you have by looking at the downpipe through the passenger wheel well.