generally, turbo, external wastegate if the turbo does not have a internal one, intercooler, a aftermarket cone airfilter, a turbo manifold with the proper flange, possible a new downpipe? , intercooler piping, a blow off of some kind whether it be to the atmosphere or recirculated, boost controller, and then you will have to see how much your injectors and fuel pump can flow, if you'll need a programmable ecu or something.