I've never seen any of them last too long. But the NAPA will last a lot longer than most. I read somewhere, if you heat the manifold up with a torch from the inside, than paint it, the paint last a lot longer.

I think Jet Hot makes a good header coating that is applied that way.

Frank

No better smell than that of fresh paint. I've been building and painting cars/trucks for 47 years. Not gonna stop now.
http://www.coxcustomcars.com/