Anyone have the power bomb header? If you do I'm looking OD diameter of the pipe wear the header meets the muffler. I have a Q2 with a klx 300 head pipe. I talked to the manufacture today she did give me dimensions but did not know if it was ID or OD, She was going to ask her boss if she could email the specks I'm still waiting.

 

I'm not sure of the exact size, but it's the same as the stock pipe. It can be used with the stock muffler though I wouldn't recomend it. Or vice versa. If your Q2 fits the stock headpipe it will work. I have both the Q4 and powerbomb headpipe. Execlent performance!