2017-2022 4" Exhaust DPF Delete Race Pipe for Chevrolet Silverado 2500 3500 HD L5P 6.6L Duramax Stainless Steel Generic4" Exhaust DPF Delete Race Pipe for Chevy GMC 2017 2022 L5P 6. 6 Duramax Stainless Steel Feature: 1) It removes the need to service the DPF at regular intervals (cleaning, replacement). 2) A DPF delete will remove the possibility of a DPF failure which could cause expensive diesel repairs. 3) Due to less exhaust backpressure, the DPF delete increases exhaust flow and therefore increases the performance of your motor! 4) Paired with an ECU remap, the