Anyone have an oem AP2 header who can measure the diameter or circumfrence of the primaries and the diameter or circumfrence of the collector.

 

I will have mine off in a month. If nobody has you an answer by then I'll let you know..

 

Sorry for the late reply. Just found this thread.
I have my stock AP2 header off in my garage, here in Orange Park. I don't have a clue where to measure for what so if you would like you can come and measure for yourself. PM me if interested.