Zen, my bars came from '87 944 (got the whole housing, and parts attached to it) if my memory is right, my 944's are 25.5 mm, and the bug's were 22 mm. I set them next to my old type I bars, and the 944's are the "heavy duty booty

" compared to the type I jobs they are the same spline and length. I can jump up and down on the back of my bug, and it's way stiffer than the old ones. It just so happens I know where some are sitting in a large metal basket(you know the place). I might be going there soon for another reason.
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1970 T1 W/MassIVe 2913cc RAT/?EFI? w/direct fire (very soon) and 915 trans
1962 SC 1776cc SP 944NA brakes, 993 wheels
VKG