OK i got my exhaust manifold's cracks welded up. I noticed a very thin stainless steel looking gasket up at the head, but how about at the bottom/after the cat to the mid pipe? I didn't find a gasket in-between there? I never noticed any exhaust leak prior? Isn't there supposed to be a gasket there?? Also, could the upper/thin one at the head be re-used??

 

You should have a gasket. I would replace the exhaust manifold gasket.

Item 11and 20 are the two gasket after the exhaust manifold.

 

My manifold is one-piece with the catalytic converter. I bought the manifold gasket, but Autozone didn't have one for the bottom of the cat. (I didn't see one there when I pulled it off)