Duramax Xdp Exhaust Tips. The gap around the exhaust pipe on the front side (facing the motor) of the tip aids the dpf regen process by creating a slight vacuum to help pull air out of the. Fortunately, ppe has solved this issue with this four to five inch exhaust.
Fortunately, ppe has solved this issue with this four to five inch exhaust. Hereโs a simple guide to installing your diesel exhaust tips: