Other than the high flow panel filters (and maybe smooth intake tubes) the best bang for the buck modifications are high flow cats or test pipes, but both will make the car somewhat louder (less annoyingly so if you get resonated HFC's or TP's).
Another option are lighter stickier tires (try AD08's?), and the lightest wheels you can afford (might want to stick with 18's for that...)
__________________
Enjoy it. Destroy it.
|