Exhaust Modifications.

[02BlueGT]

Are you trying to steal my name?

[SilverGT]

In any boosted car (turbo or supercharged) you want the exhaust as free flowing as possible! Im sure the stock mufflers wont flow well. And yes the grand prix will sound really "raspy" without resonators. Maybe look into a full 3" exhaust (more flow the better! And will support more with future mods) a high flow cat and big resonator(s) to some straight through mufflers.

No point wasting money on 2.5" exhaust and wishing you went 3" down the road (then spend more $$$)

Just my 2cents.