Strange as I run a regular FMF silencer with Aaen pipe on my 250 and its pretty quiet.I did however repack it with Aaens heavy strand packing and crammed it in there tight.Its a very heavy insulation.That said I don,t think it was that loud to begin with.Have never checked it with a DB meter and not sure how loud it is riding.

I do know it is substantially quieter idling than the Q-piped Zilla I had.