I have a need to move an exhaust manifold out a little bit and would like some input on using a 1/2" steel (or stainless) flange.
I intend to have a sandwich arrangement of two exhaust manifold gaskets :: manifold -> gasket -> flange -> gasket -> head.
Obviously, I'd need ~1/2" longer bolts/studs; but I'm curious about the different heat characteristics between the flange's steel and the cast iron manifold. I'm thinking as long as the manifold is torqued correctly, I shouldn't have any issues with warpage/leaking in the near future, but possibly eventually.
(This probably should belong in the exhaust forum, but it doesn't get visited much; also, this is fabrication )