What engine do you have? Cause you might need a bigger tubo than that. Also, you have a whole bunch of other stuff to get/look into other than the turbo. For a good start, your going to need to look into fuel/timming managment cause there is a huge market out for that. Also, depending on the turbo, your going to want to look into boost managment like waist gates and B.O.V.'s. Other than that, you just going to have a whole bunch of plumming for your charge pipping and exhaust parts. You could also look into some nessesary guages, i.e. air/fuel, oil pressure, exhaust temp, etc.

Well, hope that was of help to you