i would say you first need to decide if you are going to go turbo or just build your motor. seconds get some wheels for sure. some nice seats bride recaro sparco. i'd say just build up the motor becuase you waste money on anything else better to have a fast car than a car that looks fast but performs like a moped.. it's really about what you want. if you want to go turbo you need to research. A LOT. then you will need bigger injectors, blow off valve, fuel rail, wider front tires, an lsd (limited slip differential) s**t like that so you can get more traction... whenever your motor is built up if you have extra money you can do millions of things to the body carbon fiber hood or lip anything like that.. i'd say though for sure get some rims and some better tires..