Help ID this manifold section

[Pete Phillips]

This is in a group of Buick parts that I bought. It appears to be the center section of a 320 straight eight exhaust manifold, but I have never seen one like this. Notice that the heat riser or butterfly valve housing is cast together with the center section of the manifold. Normally, these are two separate pieces. What do I have here?

The last photo shows this piece next to a "normal" 320 heat riser/butterfly housing.

Am not sure if this is Pre-War or Post-War, so I am putting this in the "General" forum.

Pete Phillips

Edited September 14, 2017 by Pete Phillips (see edit history)

[Pete Phillips]

No replies? No one has ever seen one like this???

[superbuick]

Pete,

I think this is from there early thirties. I just replaced my 1935 60 series manifold and the center section had the heater riser as part of the center section. In those years there were 5 series of cars and 5 engines with very little inter change. I think the 40 series used a one piece manifold and all the other used the 3 piece.

MAYBE from a 50 series? Not big enough to match up to the 60 series of those years. Sure glad you got all those Buick parts to get to use to use.

Steve Fisher