Originally Posted by semtex

FWIW, I'll be doing my dyno with the bumper cover on, not off. I'm going to see if they can fit me in on Monday. Of course, I have a different exhaust setup than RCZ, so it's not going to directly answer the question of whether or not he'd have seen the same gain had he put the bumper cover back on prior to the post-install dyno. But it'll at least give us some contrasting/corroborating numbers.