I mounted a FMF PowerCore, shoe-horned the "QuietCore" for sounds checks, and things have been fine. I repacked the cannister with MSR wadding, and the directions said to pack the material "loosely", which I did. Occasionally, whilst riding, a bolt might rattle out where the cannister mates near the mid-pipe, and that will emit a louder exhaust note. Well, after my 100 mile race this weekend, by the end of it, the bike was noticeably louder, so I figured that I had rattled out one or more of those bolts (when mounted, they are under the right-side number panel, and not all that easy to see) so, last night I started to asses the damage from the race, and it seems like I have melted the pipe! I took off the seat and side-panel, and all of the bolts that hold the cannister to the pipe/core were still there, but the aluminum all the way around the bolts was gone! Here is a picture of that. (Bolts were in when I took the pipe off) Then, when I took the cannister off the core, it appeared that all of the packing material had migrated towards the end of the pipe. Front half was empty, rear end was packed tight. Here is a picture of the packing material in relation to where it was inside... I know that exhaust was still able to exit via the endcap, but I can see that much exhaust was also exiting out the front of the cannister, and that must have been what melted the cannister. Did I pack the packing material wrong? Is this a common problem? I appreciate any input. Thanks!