[91GTturbo]

If speed is what your after, the first thing I would recommend is not getting the ground effects or neons, they add unnecessary weight and will only slow you down. Plus 99's have ground effects anyway.

As far as performance mods, I'll list them in the order I think is the best bang for the buck.

1- 3.73 or maybe a 4.10 gear. The modular motors love to rev, the gears will keep you high in the rpm range most of the time.

2- Exhaust. A cat back will do fine as Midnite mentioned, but a full exhaust (i.e; headers, h or x-pipe, and mufflers) will help alot.

3- Steeda timing adjuster so you can bump timing.

4- A larger mass air meter. This allows more air into the motor, more air=more power.

5- Aftermarket shifter (i.e; pro 5.0 or hurst).

There are alot of other things, I don't know your budget, but since your still in school, I can't imagine it's too much.

You could also find a 90-93 fox bodied 5.0. Parts are every where for these cars, plus parts for 5.0s are cheaper than for the modular stuff. And a fox will cost you considerably less than a modular.