Excelsior Manifolds?

[fouraceswes]

Here is another perhaps pre-16 question perhaps not! These two manifolds from the same “old timer” garage are marked Excelsior but the two Excelsior bikes I saw had spigot mount Sheblers and manifolds that were curved. I assume Excelsior, but what years?

[gharper]

Those are Excelsior. They would fit 1925-31 Super X I believe. Interesting the one that has a threaded plug on the side, never seen that before.

Gene

[fouraceswes]

Hey Gene, Thanks for the ID on the manifolds. Upon closer inspection, the threaded fitting does not look like a "factory placement" more like a braized on nut and screw that was added a bit amateurishly later on.

[bernhardt]

Nitrous Oxide

[T. Cotten]

I've got an NO2 vendor a half a block away, Alex!

http://www.animaljimracing.com/

Water injection made more sense to me...

....Cotten