Ok, so I've read that a long time ago esr didnt have that good of port work. Some one said it looked like a "cookie cutter". I called them last year and asked if they could improve on it and get me some more power and they said yes. This may be true but then again they might just wanted to get my money. I am rebuilding the top end this winter and want to know who to send it to. Who do yall recommend? And what do yall think of this port work?