What size exhaust should I use for a single pipe cat-back exhaust for an SE, 2.25 or 2.5? All I will have for mods is KKM, single magnaflow muffler, chip, and sho y-pipe. So I am just wondering if going to 2.5" would be too large for the mods I will have. Or if I even need to go to a larger piping than stock.
