exhaust w/ out intake?

[sd88supra]

well, i dont race but i do like to speed. my 200 stock hp is good enough for me, but my muffler (stock) is starting to go bad. doesn muffle that well anymore and im starting to feel like its making me lose power now. however i dont wanna kill my fuel economy, so im not sure about upgrading my intake. if im correct, the more cold air you get the more fuel youll have to take in to compensate, right? lol, see im a noob, like i said i dont race i just like speed sometimes. i do however, wanna put in a better exhaust. im not looking for those annoying ones in civics that you can hear a mile away, im looking for one with a nice growl and not too damn loud. suggestions appreciated.