dude, do a search. all of these questions have been asked before. and if all you want is a 13 sec car that is great at daily driving, do the greddy kit like schmoo and I did. pretty safe for the engine and doesn't completely drain your wallet. dont forget you will need a stronger clutch when you put any kind of forced induction (turbo, supercharger, nitrous) on a car. but to reiterate, please use the search.