I'm looking to put an intercooler on my 05 GTP, its cheaper than headers and i dont wanna put headers on right before winter. i'm just wondering how an intercooler will affect my car from horsepower to gas mileage, what kind to get, where to get one and if it will do any harm or not to my car. right now all i have is a K&N filter and a SLP cat-back powerflow exhaust.

if you know any good sites for parts let me know. i know of zzp