My mod plans are simply to open up the intake and exhaust, possibly add ECU for margin of safety and possibly turn up the boost to 11-12 psi. When the time comes, maybe pulleys, and a light weight flywheel. I plan on sticking with stock size wheels and tires and don't want to have something that's so powerful it breaks traction in 2nd and 3rd gear. Basically I would aim for what the car possibly should have been from the factory in an unrestricted emissions world.