I was wondering if anyone has a dpf back after market exhaust system on their truck? I have MBRP Cool Duals on mine and was wondering if anyone was running the same ones with the dpf still on their truck. I have to take my truck back to the dealer and I am hoping that I can just keep the cool duals on with the dpf when I take it in. Wasn't sure if they would say that will void the warrant even thought the dpf is still on. The system is designed to work with the dpf.