Hi there. I'm new to this forum and I have just bought an A5 3.0 Quattro SLine. I was wondering if any one had removed the two back boxes and replaced with a pipe? I am not looking to buy a cat back system or delete the DPF. I would just like a little more of a tone from the exhaust as the standard is very quiet and wondered if any one had done this and what the results were. Thank you.