Originally Posted by evolution

A good reason not to mod it. Bolt-ons do squat. I just picked up an AEM EMS from someone and after I tune that i'll be lucky to get 15-20whp. I'm using decent parts too. Not even sure if I want to put it on. Friend with all Mugen set up paid roughly 10k for bolt-ons and 15whp?

Best bang for buck if you want to go fast in a straight line = FINAL GEARS. $1000 and you can pull 2-3+ car lengths on a stock S2 up to 4th!