GenV is likely to still have it's coating over 200k, not so much with the GenIII. When I did the top swap I was really worried about having the coating on my 3, so I bought two units because the first one I mistakenly cleaned off all the coating thinking it was carbon. To be fair, it was flaking off pretty easy. Anyways, pulled my blower after maybe 15k and the rotors were bare again, probably from spraying water/meth. Never noticed a decrease in performance.
Basically, I'm sure it's there for a reason but when it's not there, there are really no negative side effects. Maybe a couple HP on a Dyno? Probably less than the margin of error.
