EVERYTHING ABOUT TOYOTA 4AGE

The blacktop has lighter internals which happen to be also weaker, but it's a bit more rapidly. No hurt if you're not doing any large mods, but any pressured induction and you will be needing to uprate the blacktops internals.As such they don't seem to be interchangeable in between each other Except if the matching VVT pulley can also be equipped,