The blacktop has lighter internals which happen to be also weaker, but it is a bit more quickly. No damage if you are not accomplishing any massive mods, but any forced induction and you will be needing to uprate the blacktops internals. I put bars on leading and base to https://donovanpurke.blog-a-story.com/6454213/helping-the-others-realize-the-advantages-of-4age-20v