My blaster has been running oddly (bogging slightly, running a little lean) and while riding today I've noticed that the exhaust (stock) sounds like it has a hole in it. Well after letting it sit for a bit, I started it up to warm it up, and I saw smoke coming from the header, I looked down at it, and.....Theres a metal......Its hard to explain, between the port and the header, and theres a gash in it all the way around. What is this part called, can I hurt my blaster running like this, and can I get a new one?