I did a bit of research in attempt to silence my RZR. I decided on the easy route and purchased a blt on silencer rather than install new muffler as well documented in other threads. I was unable to find hard numbers on silencers so I made the purchase and recorded my results. Basically you get a 3 dB reduction in hard numbers. How this translates into noise reduction is very little as a 10dB results in 50% noise reduction. You basically end up with more of the perceived power/pressure reduced and a little noise reduction. Please let me know your thoughts.

RZR @ Idle

RZR @ 3000 RPM