Troy,

One last question and I'll stop bugging ya. I want to cut a portion of the muffler pipe off to better accompdate my cowling exit . I plan on using the jam nut (threaded on the pipe above the cut) as a thread chaser after making the cut, but would feel better if I had the proper size die in case the jam nut doesn't quite straighten out the threads.

What size is the pipe thread at the muffler end?