Off road mid pipe, tb/plenum, tune and gears. I've noticed decent gain with all those. Having been where you are, I would start with 4.10s and tuner. Best bang for your buck.
Or go straight to nitrous. I'm about 6-8 months from purchasing a nitrous kit. Quickest/cheapest way to 100whp gain for these cars.
Or go straight to nitrous. I'm about 6-8 months from purchasing a nitrous kit. Quickest/cheapest way to 100whp gain for these cars.