I just put down a deposit for a 2012 p4s and I've been trying to search for this particular topic with not much luck. I see plenty of threads talking about whether to choose pse or aftermarket exhaust but not much on whether both of them would work together. My car already has pse and does the pse button still function with aftermarket exhaust? If so then which aftermarket exhausts would work? What are some of the exhaust brand would you recommend? Thanks in advance.