for building your turbo kit you're gonna need some way to boost up your fuel pressure with the boost you're gonna be adding. you'll also need a wastegate (internal or external will help you decide what kind of manifold you will be going with) downpipe to connect your turbo system to your exhaust an intercooler is a good idea if you're running more than 4 or 5 psi, a blowoff valve, and some way to monitor it all...boost gauge and fuel pressure gauge at least.