Car exhaust is too loud??

Well when you say exhaust system, does it include headers and a cat-back exhaust or just a muffler? Also is there a catalytic converter, test pipe or nothing at all attached after the down pipe? IF you have aftermarket headers, different brands are louder than others like DC Sports are really loud on my friends prelude. If it's just the muffler get something close to stock with a 2.25" or 2.5" outlet instead of a fart cannon. Also high flow cats or an OEM cat will keep you legal and quieter.