11-16 Powerstroke 4″ Downpipe Back Exhaust – No Muffler

11-19 Powerstroke 4″ Downpipe Back Exhaust – No Muffler by P1 Race Parts Competition Exhaust Systems is an ideal solution to pair with a race tuner and delete your Cat and diesel particulate filter (DPF) off your diesel pickup truck. You must use a tuner when removing the DPF off of the vehicle