Kicking it up a notch
 

Looking for ways to boost the HP on my 2002 GT without getting into the engine for now. Any suggestions?

Besides the most obvious and common ( gears ) wich have no HP gain but give you the most bang for the buck, I would go with pullies,timing adjuster, MAF, NO COLD AIR, and maybe a chip if you want the added cost of premium gas. From there you are going to get into the engine. ALSO, you can change out exhaust if that has not been done yet and nitrous or a blower would be nice! If your car is stock this is what I would do, everyone has there own opinion so take this with a grain of salt.

1. Gears - 3:73
2. Exhaust - X / H and cat back system
3. Pullies
4. MAF
5. timming adjuster/chip - if you want to run premium gas $$
6. nirous or blower -

go get em!