thank bro for ur tips...bolt on turbo kit can be custom/rojak from other makes.... all u need is turbine (td04 sufficient), intercooler (gsr one ok adi... mau bagus lagi vr4 ic), aftermarket bov, custom intercooler pipings, piggyback ecu... u'll need to do custom exhaust manifold....
u may want/need other enhancement such as fuel pressure regulator, larger fuel pump, larger fuel injector, bigger throttle body, etc...