Never wrap headers, regardless of what they are made of.....
Cermacoat headers and exhaust inside and out. That is the solution.
That's what we did at JBA back in the day. I just had a set of headers re-coated that
were originally done in 1990. (Coating was starting to show some signs of failure)
Nice and cool all these years and non-rusty headers.
As the drill sergeant said, "I taught you everything you know. I didn't teach you everything I know."
"Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams