4″ Downpipe Back Delete Exhaust W/Muffler | 17-19 Duramax

431021-880 Mel’s Manufacturing | 4″ Downpipe Back Delete Exhaust W/Muffler | 17-19 Duramax

17-19 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.