Until now, I never had much success with so-called Hi-Heat or Header paints; most would be gone after the first trip.
So far, my last experiment has done quite well.
I wire-wheeled and paint-thinner cleaned an exhaust manifold that was NOT ON THE ENGINE.
The paint I used was flat red VHT Flame-Proof Silica-Ceramic Coating 1300-2000*F
I put on several coats.
I did not "bake" it as was recommended.
However, and this may have been partial to my success, it was several days, maybe even weeks, before I bolted the manifold on the engine.
The first few trips, there was this highly disagreeable poisonous chemical odor that permeated the cab; plus, the manifold smoked enough that one would have thought that I had an engine fire.
The smoking has quit and the poisonous smell has all but went away --- or I am just becoming used to it.
The manifold actually looks better now than when first painted.
By the way, the turbo gets no hotter than the manifold, so whatever will work on the manifold will also work likewise for the turbo.