351c 2 v exhaust donut gaskets

I can’t seem to find the correct donut seals. I have heard that the 351c 2v does nt use them. Does anyone know if this is correct? How do they seal without gaskets?


I can’t see how they would seal without these.

My 72 XR-7 with a 351C 2v did not use donut seals on the exhaust manifolds. But some years may. See the picture below. If yours had the end like the one to the right you do not need them. But is it looks like the one to the right you do need them.

I hope this helps, Good luck with the project.

Yes, I have the ones on the right.

Thank you

That style has a flared H pipe. It bolts up to the manifold without a donut gasket.