431107-801 Mel’s Manufacturing 4″ Downpipe Back Exhaust Duramax 01-07

01-07 Duramax 4″ Downpipe Back Exhaust by Mel’s Manufacturing (formerly Flo Pro) is 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.