4″ Downpipe Back Exhaust with Muffler | 01-07 Duramax

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

01-07 Duramax 4″ downpipe back exhaust with muffler 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.