I think Ive done most of the basic mods out for the 08. Belanger headers/exhaust and a K&N air filter. I dyno'd mine at 568 to the rear wheels while two other stocks dyno'd at 507 and 521hp..you can also give the car speed by lightening it up. Take off the heavy rotors and put on some stop tech aluminum slotted or drilled rotors. Jon B will sell you a set of the light weight SSR 18" wheels which shave off more weight. Along with some Kumho Ecstas for extra stick. Motons and Eibachs, a wing, splitter, and canards give it that sleek look and make it stick on the track corners. Then theres always the little stuff: short throw shifter, carbon fiber console, 6 point harnesses, seat lowering kit, clear bra, e-brake relocation kit, stainless steel brake lines and a roll bar if its a convertible... anyways ..thats what I've done so far.
Kobi MD