Well if you want a lot of hp you are going to have to go turbo or supercharger. I personally thing that turbo would be more efficent. They have a lot of guys who have custom built thier own turbo kits for less then any kit ull ever find. I havent done it yet but ive been reading about it and plan on doing it in the near future. The best way to learn what u want and what u need is by reading the forums in the forced induction part of the forums.