I have a 1997 E36 M3 sedan that I would like to put a little more pep in its step. It is bone stock and has 164k on the dot on it so im trying to keep it a reliable but fun daily. Im looking for some pops and burbles from the exhaust and was told to get rid of the cats and replace them with a X pipe and resonator with stock muffler. Cant be too loud but better sounding. Anything I should do instead?