Depends on your budget and goals. You've just got to modify the car. You can make it lighter, make the engine's internals and everything dragging on it lighter, you can put more air, fuel, and spark into it and take more exhaust out of it and change the time and duration that everything happens and you'll get more power or the illusion there-of. Assuming of course everything's done right. Otherwise things might actually slow you down or blow up.