I wanna do some performance stuff to my NEW TO ME 97 GTP, do those performance chips that you see on ebay for ten dollars do anything, I am sure they dont, but has anyone had any luck with them.. I know a CAI would be benificial, also a exhaust kit cat back or rip the cat out?? what are some hp gains with exhaust and CAI, where to go for a performance tune or a tuner??? I need help, or i mean the car needs help.