Eastwood makes a paint called manifold paint that they say is a one time paint job for the manifold. I have not used it yet. But plan to give it a try. Ceramic Coat is the way to go.

This

http://www.eastwood.com/stainless-steel-high-temp-coating-kit.html

or this

http://www.eastwood.com/calyx-manifold-coating.html


1959 Chevy Apache 3100/ 283 TBI / 4L60E

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https://www.youtube.com/mikebtte