It's far lighter than stock, and very classy and low-key in appearance. It's certainly louder than stock, but only when you get on it; at low revs, it's not objectionable. You can choose to put the badge on it or not at purchase, which is nice, since I always have to remove the badge on other exhausts.
http://www.holeshot.com/old/mz/mz.html
Of course, this now just highlights the state the headers are in - when I dig into the top end, I'm going to clean them up a bit. I got the jet kit from Holeshot, but it seems the bike was rejetted too rich before, since it runs great now (it had some surging before).