Well most people sell the parts from 250-500 then you need the gaskets which run around 200. Then if you want to port the TB, SC, or LIM your looking at anywhere from 100-200 more. Then you need oil and what not so like 40+ more then if you dont have a boost gauge you should get one of those and a place to mount it.. It all adds up.. Most people recommend headers so thats 220 more