Just got off the phone with the casting company, and was told a few "special" heads I designed will be on the way the middle of next week. The heads will be cast in a very limited quanity [3], and will post test results soon. The early tests indicate a 11% increase in flow and will be made with the 10 MM spark plug hole. I designed the head to run much cooler [over 100 degrees] to keep the power consistant. Sometime in the near future the head will be offered as an upgrade, but not until it passes all my tests. This will be "made in America", "designed in America", "tested in America", and subject to "American quality control".
Have fun,
Have fun,