4″ Downpipe Back Delete Exhaust No Muffler | 15.5-16 Duramax

431019-871NM Mel’s Manufacturing | 4″ Downpipe Back Delete Exhaust No Muffler | 15.5-16 Duramax

15.5-16 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 3 Bolt Flange. If you have the V Band Style please order the 11-15 pipe. You can see which type of flange you have by looking at the downpipe through the passenger wheel well.