Brian, I have heard this before, but I wonder. I know they didn't use gaskets when new, but 30 years later the manifold is not going to be in pristine factory condition. It's bound to have warped some (?). It seems logical that you would need a gasket eventually . . . On the other hand, your personal experience is a good argument against it. Mark M 67imperial wrote: > As long as the manifold being put on is not warped. Do not use a gasket. The > factory did not use exhaust gaskets and had no problem with leaks. Every > time I have used exhaust gaskets on my mopars they leak. I take them off and > they no longer leak. > Brian