Few months ago I bought another Ghibli GT from Japan. The car is in overall good condition but has been slightly modified. To the point, the car is equipped with hks turbo boost controller and I need to know what is the stock boost level set by the factory to 2.8 Ghibli GT manual and, if anyone knows, what is the safe boost level for the motor to not brake it instantly (the car is decatted with free flowing exhaust)?