Welcome aboard mate Firstly you would be needing a new turbo (price would depends whether you got for a hybrid ct9 or a tdo4 kit etc there aree loads to choose from) Then you would need the uprated manifold and downpipe and full exhaust system and some sort of induction kit mounted near the front if possible. That would be your breathing sorted. Then fueling would be the next step, some uprated injectors and fuel pump and some sort of fuel controller to make sure you dont run the car lean or too rich You may even need to uprate the internals of the engine but that would depend on thecondition of the engine Oh but FIRSTLY I would uprate thebrakes and suspension because you cant got fast if you cant stop or turn a corner Hope this helps ToyTuning is the Starlet specialist not sure how far it is from you but check the site for more info on them