buy aftermarket ecu but pre-tuned price also almost the same as buy second hand standalone.
aftermarket ecu also need re-tune, as standalone also need re-tune. why only standalone need to standby money? care to explain nappx?
I've heard that port bit of outter part to exhaust in the turbine makes air flow smoother.. is it true? but some say
it's quite risky because it might have some chances that the shell of turbine will get cracked.