Japan has extremely rigid emissions testing, so much so that it is cheaper to throw in a new engine rather than try and get the existing one to pass... Now tell me, if you knew that you were going to put a new engine in your car, how nicely would you treat it? Personaly I would probably spend my time thrashing on the engine with most of my time at the rev limiter. Did you buy my engine used?
1994 Black 300ZX TT 1991 Teal MR2 NA daily driver(in the background)