Depends on where you want to take your car. UTEC is if your gonna go all out, IMO. Get a Turbo Back or even Cat-Back exhaust if you just want modest power gains and you arent going to mod the hell out of the car.
The only gains you get from a catback are sound and appearance. A turbo back will gain some power, but for the same price (if not more) than a UTEC. And, a UTEC will give you more power gains.
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