Looking for the numbers and source for the head to exhaust manifold gasket, and the copper compression ring for header to exhaust flange.
I have had the problem of a backfire when shifting in the upper RPM range. Usually indicates a fresh air leak into to the exhaust. I have removed the header (1320) and do not see any obvious places that have been leaking so I want to replace both gaskets and ring. I wonder if an application of the red gasket sealer during install would be of benefit.
What say you?
LC