My Lexx Pipe on my 2007 WR450 is separating from the header pipe. I can feel exhaust coming out. The shim or whatever you call it is separating. I tried pulling it off but couldn't get it off the header pipe.So I tried to clamp it, but notice it's getting worse. I think I need a pipe wrench. It's stuck on there. When I installed it I used high temp gasket silicone as it stated. Has anybody else had this issue and what's been your solution. The little dings is me being stupid in trying to hammer it back.