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This upgrade reduces exhaust backpressure, which can significantly enhance your truck's overall performance. The DPF is intended to serve as a support system for a diesel vehicle's emissions control system. The operation to remove the diesel particulate filter comes with a number of conditions, nevertheless. Overall, deleting the EGR and DPF systems can provide many benefits for your 6.7 Powerstroke engine. You must use a tuner when removing the DPF off of the vehicle. The choice of 4 inches and 5 inches is det