I was getting into my car today and noticed this on my muffler pipe. I rode earlier this morning and the bike ran fine but i did notice the decel pops that you get were a little louder than normal and I was getting more backfires from shifting. I scraped all that crap off and there does not appear to be a hole and also started the bike up and didn't feel any leaks coming out of the pipe. Checked all around that area from more gunk and didn't see any anywhere. It is an FMF Powercore 4 exhaust.