I have Power Enterprise Turbo's on my car that are IHI, and when the mechanic saw them told me they wouldn't be much better then stock turbs or maybe similar to N1 turbos, but after a good tune, our jaws dropped from the power the tiny twins produced. Mind you , not from such tiny amounts of boost the R35 is using but non the less, they were very impressive, and at least a couple years old now. I rated IHI after having these turbs.