Don't get me wrong... I have put CAI on my last 3 cars and catback exhaust on the last 2. But look at how this car is engineered. The airbox is already vented to the fender for cold air and the muffler has a valve that opens on acceleraton to reduce backpressure. I'm sure you could sueeze out a few more horses with aftermarket parts, but its not like the car isn't doing it already. And I know its cool to have those parts on your car, but the other cars need them because they aren't engineered as well. With the money you save, you could buy those 18 inch wheels...