So i have a 1997 Mazda 626, what can i do as far as performance boosts? Ive heard of performance chips but sort of skeptical about the ones on Ebay, (I.E the RSC and boss) But if they really do work, even to boost HP by 15 or anything along those lines tell me. What about turbo kits and superchargers? Cold Air Intake? Anything else i could do?