Im 19 and new into the racing and building my car   i have a few things into i put in my self i cold air intake a new exhaust i was just wondering what else should i do to it . exterior of my car is insane already viper style carbon fiber hood z3 body kit fenders and a good paint job just need to kno what to do under my hood now  

ok turn it back to stock and just drive it. those motors are no good to begin with let alone trying to race it will melt your head gasket so just drive it dont modify it  

Man viper style cf hood? z3 body kit fender? Oh man! Sorry but rice is not nice! Did you even install a decent name brand anything on your car? Sorry got a little off topic, but to answer you question try a name-brand header, test pipe(if your state allows) msd spark plug wires, msd coil pack, spark plugs, and oh yeah, a tune up. That's pretty much it unless you go forced induction(turbo/supercharger) if they even make it for you ride. Oh wow they do check out Hahn racecraft's turbocharger for your car.