I never said the Stage 3 Kit came with all you needed, did I fag? On the website it says "To be used with a fuel management system". I was merely saying that RevHard's Stage 3 Kit is the most powerful turbo package I've seen on the market, especially compared to Greddy's and the DragGen. If you're going to go all out speed, why not spend five grand or so if you're going to get over twice the put-out of a Greddy or DragGen that still costs you 3 grand?