alright, just recently (a couple months ago) got my 03 GT. love it! the only mod i have done is a CAI, and now i have about $300 bucks to do something that will actually make a little difference. I came across two awesome deals and can't figure out which one is better. A friend of a friend owns a muffler shop, and he said he can hook me up with a catback with mufflers (More than likely flows) for $300. But then my mechanic friend offered to help me install some 4.10s, and i dont think he'd charge me (I'd pay him anyways). which should i do first!?!? Just want some advice from others who have been there. also, what kind of mufflers if i do exhaust, super 44s, outlaws, glasspacks? i like em loud n deep (i wanna FEEL the rumble).

GEARS!!!!