Sorry Chris,

Pipe is still in the plane which is now in a friends hands for turbine training. I can do a hand drawing of the setup if you need it. Let me know and I'll draw it up if need be.

Erick,
To tune a pipe you put the engine in a stand, run it without a pipe and tach it then bolt the pipe on and tach it again. Cut a 1/4" off the header at a time till you get an increase in RPM, when the rpm shoots up about 500/1500 rpm your tuned!