Originally Posted by DGS
Originally Posted by jcc
Originally Posted by Neil
I don't think I would coat SS headers on the outside, but I would definitely consider coating them on the inside.

Why?

I am unconvinced inside coating is more than a few limited inches amounts to much anyway but I am open to be proven wrong.


You could try Eastwood's Internal Exhaust Coating - it comes with a long nozzle and gets good reviews:

https://www.eastwood.com/eastwood-hi-temp-internal-exhaust-coating-w-nozzle.html

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I have wondered about this product. Obviously this is meant for unused headers because how can a used header be cleaned sufficiently internally for proper adhesion?

Keep old mopars alive.