Originally Posted by
22Racer
I did some measuring on some different plugs today. Os, Voodoo, Od, and Nova were all very close on angle and diameter at the tip. The only difference being the relief of the threads on the tip end. I had a friend send me a newer Nova plug as the one I had was a few years old, when I get it I will do a full report.
Rex
Once again , the issue has to do with the length of the taper and how thin the nova head buttons are at the end of the taper closest to the combustion bowl