Quote Originally Posted by 4THGENCAMAROFAN View Post
no fuel mileage wont be affected as long as you dont get into boost a lot....but you need supporting mods for a 3.5" pulley first.
Such as? This is my first 3.8 car, and my first SC'ed car, so I'm new to this. . . I'd imagine it just needs a better exhaust setup (minus the u-bend), air intake of some sort, and cooler spark plugs. Anything else?