OK, I have the Barker exhaust and normally run with the quiet core. While riding yesterday, my exhaust kinda sounded funny and I couldn't figure out why. Today, when I went to wash off the mud and crap off, I noticed that there was no screen showing. I took the exhaust tip off and there was only the ring there... no screen and no tube attached. Took a flashlight and looked inside the muffler and the tube is way deep inside, but can't tell if the screen is in there as well. Now have to take the exhaust completely off to try to fish the tube/screen out or shake it down to the end where I can grip it and pull it out. Needless to say... the quiet core came apart for some reason and now I need a new one, but haven't been able to get ahold of Barker to get one sent.