If you want to remain N/A... Stillen G3 Intake, Fast Intentions Exhaust, HFC, NonStopTuning crank and alternator pulley (with new slightly smaller Gates belt), and a tune. If you can't get dyno tuned, get the Cobb Access Port with competition tune preloaded. Shave some weight off the car while you're at it. I'm pretty sure you can do this for under $4k.
If you plan on force feeding the engine, then save up for a supercharger.
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