dish wheels (work, SSR, Volk), COILOVERS, shaved body moldings, NO GOLD ON THE CAR ITSELF! polish your intake manifold, have superstar customs paint your VC or engine cover (plastic) de badge it, custom lisence plate, tint, exhaust... then do a completely custom stereo with glassing and small light effects... thats a good START.

CF hood, trunk, custom paint and there from there you gotta come up with alot of stuff on your own... i got ideas... but i started you off