I am going to be buying a 03 CTS this weekend and l wanna know what l can put under the hood to give it some extra horse is besides just cold air intake. Referrals to site would help but would greatly appreciate opinions on what l should add to the car.
l can not seem to find a supercharger kit for the regular 3.2L CTS

one word: SUPERCHARGER! nothing works better at getting h.p. out of a car then that.

if you wanna go cheaper, get a cold air intake. they are like 100 bucks, but you will get like 10-20 more h.p. out of one.

l would not by that car and get a lexus is instead they are better, look better, will last longer, and perform better.