I removed my muffler and wrapped it with header wrap, because it was putting out alot of heat onto my side plastics. After wrapping, I get a muffled backfire when I turn off the bike, there's a slight pause first. This is an aftermarket muffler thats been on the bike for about 3 or 4 years. It didn't do that til I removed it and wrapped it. It's a utility style muffler not a performance muffler. It doesn't have any type of heatsheild, so I tried the wrap to see if it would help, it doesn't.