The blacktop has lighter internals that are also weaker, but it's a bit more rapidly. No damage if you're not carrying out any major mods, but any compelled induction and you'll be needing to uprate the blacktops internals. You will find as quite a few tuning theories as you will https://landenusqnk.prublogger.com/26482706/considerations-to-know-about-4age-20v-itbs