17-23 Duramax 4″ Downpipe Back Delete Exhaust

17-19 Duramax 4″ Downpipe Back Exhaust by P1 Race Parts Competition Exhaust Systems 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.