THE SINGLE BEST STRATEGY TO USE FOR 4AGE 20V

The blacktop has lighter internals which can be also weaker, but it's kind of quicker. No damage if you are not performing any major mods, but any forced induction and you'll be needing to uprate the blacktops internals.As such they ARE NOT interchangeable in between each other Unless of course the matching VVT pulley is additionally fitted, by way