I have a MRT O/R H-pipe and the Stingers. This is a loud combo, but I like it overall. It has an annoying sound between 2000-3000 RPM (kinda like a glasspack I guess), but after that, it clears up and sounds mean. I get lots of compliments on it.
Here are couple of mine:
http://videos.streetfire.net/video/0...h-OR_86052.htm
http://videos.streetfire.net/video/0...h-MR_71324.htm