For now, get an A'PEXi V-AFC and take the car to a dyno. Just tuning the thing will probably yield an additional 5-10 whp.

From there the options are pretty extensive. A common path is to get some cams (skunk Stage 1 is the way to go with a B16), freshen up the valvetrain and some adjustable cam gears, then toss her on the ole dyno for some more dialing in of everything.

The stock fuel and ignition systems are fine. Next step after cams would be an ITR intake manifold and throttle. And you guessed it, more dyno time.