[blue00gt]

Try doing a search and reading some past threads as this is the most common question asked about new cars. Lowering springs and exhaust are a good start, although shorties give you almost no gain on mod motors. Same with cold air kits - they are just for looks. Throttle body doesn't help much until you have opened up the rest of the intake and exhaust. Many folks say that gears are the first mod you should make on mod cars (4.10s or 3.73s at the least). As far as bang for the buck horsepower, h- or x-pipe, underdrive pullies, timing adjuster, and mass air meter all give decent gains for the cash. Short-throw shifters such as the Steeda Tri-Ax or Pro5.0 are a great mod also.