I removed the county fair grand champion water mellon cat today. And the 30 gallon barrel muffler on my 600 today. Replaced them with a 4" twister muffler, It really sounds pretty bad. Kinna sounds like a V10 with turbo mufflers (VERY RASPY) when I find time I'm gonna try to remove the silencer ring to see if that helps any. Any imput on this would be very appreciated.