Well OK I now have a 12" Scorpion slip on, while it was apart I noticed the fiberglass material inside. OK the Harleys don't use the stuff so what purpose does it serve? It is mainly for noise or does it have anything to do with the tuning of the bike. Will less make it louder? So if I remove 1/2 the stuff it will get a little louder. Decisions, decisions, decisions. If nothing else the bracket is now centered on the pipe. Thanks.:headscratch::loco::runaway: