Looking for a measurement

[94touring]

Compiling some manifold data and looking for the runner diameter of a stock twin hs4 manifold, AEG573.  Both where the carb mounts and where it mounts to the head (minus the ring).

[Willie_B]

Have one in the basement. Let me pull it out and measure it.

[Willie_B]

Inlet side, 1 15/32. Outlet side, ring groove 1 11/32, then 1 1/4.

[94touring]

Basically the same as an hs2, but with a mouth to match a 1.5 inch hs4.  Interesting. Thanks for measuring.