I have not posted a message before, but since I have spent over an hour looking for my answer and can't find it I need help. I bought a new 08 WR450 (last year's model, new) and I am in the process of doing all the modifications the factory should have done in the first place. It's pretty bad when my 99 WR400 woops its ass all over the place. I bought the TT kit, jets, needle, and promoto billet for the exhaust. I am starting with the exhaust. I pulled the end cap off the exhaust along with the stock insert. I also removed the two rivets holding the end piece on. Here is my question. How do I get the end piece off? I have tugged on it, even put the insert back in for more leverage as I pull. I don't want to mark up my pipe. How in the hell do I get it out so I can gut out the plugged up pipe? Any help is appreciated!