Hi, I just started my 1999 GT mods with a full length densecharger with new Pro-m mass air calibrated specifically for the cai. Then an accufab 70mm t-body and plenum, and a borla cat back exhaust. These things together should get you 25-30 HP and the car sounds perfect. It winds up twice as fast, and pulls into the red MUCH easier than before. For around 1200 bucks if you have the money, this is an awesome start. Car is not loud, but still very mean sounding!!! Future mild mods to come. I love the cars driveability and dont want to ruin that aspect. I also have a 2002 BMW Z3, but the stang is MUCH faster and fun in a strait line!
Just got 4.10 gears and new DS in today. Next step.. suspension