03 gt
pro 5.0 short shifter w/steeda knob
-frpp 4.10 gears
-steeda underdrive pulleys
-k&n drop in filter
-diablo handheld tuner
Bought the car with these mods. I'd like to pick up a few hp and it seems opening up the exhaust is the next step. I'm happy with the car so far, but I'm...