I’m new to the deleting game so brace with me. I have a 2010 6.7 Cummins that I recently deleted and have a tuner on. I was being rushed by an upcoming hunting trip and just needed my truck running so I found a cheaper 4inch down pipe with a cat/dpf delete pipe that ends under the back seat. So my question is, if I buy a 4 inch dpf back exhaust to get the pipe out from under the truck will it be a simple clamp up/exact fit? Or do I need to find a whole exhaust system?