Finally got the CFO to budget some funds for a set of new slip-ons for my 09 RG . I went with 4" slash cuts from RC Components with 2 1/4 baffles. They are maybe just a shade louder than I was expecting but are not obnoxious. They have a nice deep , throaty sound to them. On the road they deffinately will bark when on the thottle hard but settle down nicely when at cruise speeds between 50 & 70 or so. For those that want more sound but not too much they seem like a pretty good choice imho.