My suggestion would be not taking performance advice from a video game. Gran Tourismo is cool and all but there's much more you need to research before getting into something like this. Your first step will be either a rebuild of your current engine or maybe swapping out your current engine for a newer B16A and turboing that. Costs of engine rebuilds depend on who is doing it and what actually gets done. You'll need to contact some local shops for pricing.unc1127 on Sep/01/02 said:so should i just get like a stage 1-2 turbo? what do u suggest?