Go to
www.Probetalk.com and search for HD CAI. It's a cold air induction you can build yourself for about 40 bucks. It doesn't look as good as a more expensive one would, but works just as good if not better. Also, my first mod waaaaay back when I first got my Probe was an MSD 6A box, if you don't know what that is, just go to your loca performance shop and ask them for one, they are about 120 bucks and come with all the directions you will need. In my opinion that is the biggest HP adder for your money (besides the CAI). Any other questions, feel free to contact me any way you can. :smoker2: