L
I really like HPS. The sound level is just right. Nice and aggressive but far from overwhelming. Had one on my XM and got one for G4. It's very well built. The guys are great to talk to at HPS as well if you have any questions. My only complaint on the G4 model is that they don't have a ring welded on the pipe that dumps out of bottom of sled like they did in the XM. So you have about a 1/2" gap around the exhaust outlet where snow can get in.