High Temp Ceramics

Do anyone have any real world experience how these high temp coatings hold up on SS exhaust tubing?

So, does the coatings hold up better then the old age header paint? Do the coated headers hold up better then bare steel headers?

The number of heating and cooling cycles, the temperature range the headers see, the fact they hang down under the chassis without protection, are all things headers have to go through. That has to make it hard for any protective finish to endure.

Stainless steel header tubes get brittle and the tubes tend to stress crack.

The header business has always had long life issues. One really only needs to look at how many cast iron exhaust manifolds have failed over the years, and one might give headers a bit of a break.

Which side of the Intracoastal do you live on?

Here are my TTI's that I had them coat black. This started very quickly

Embrace the rust
if it is made “less flakey”
and almost like paint?

That is the idea of COR-TEN steel such as grades ASTM 242 and ASTM 588

https://en.wikipedia.org/wiki/Weathering_steel

sample quote

Disadvantages
Using weathering steel in construction presents several challenges.

Ensuring that weld-points weather at the same rate as the other materials may require special welding techniques or material.

Weathering steel is not rust-proof in itself: if water is allowed to accumulate on the surface of the steel, it will experience a higher corrosion rate, so provision for drainage must be made.

Weathering steel is sensitive to humid subtropical climates, and in such environments it is possible that the protective patina may not stabilize but instead continue to corrode.
For example, the former Omni Coliseum, built in 1972 in Atlanta, never stopped rusting, and eventually large holes appeared in the structure. This was a major factor in the decision to demolish it just 25 years after construction.
The same thing can happen in environments laden with sea salt. Hawaii's Aloha Stadium, built in 1975, is one example of this.[26] Weathering steel's normal surface weathering can also lead to rust stains on nearby surfaces.
end quote

Note the bit about the arc welding rusting faster than the base steel.

I see more and more electrical power line towers made of cor-ten steel than 20 years ago.

I am more a fan of the South African invention: so called 3Cr12 steel,
much less expensive than original 8Ni-18Cr stainless steel

https://www.atlassteel.com/products/3cr12

is it possible you got the black "Rust prevention" coating vs. ceramic or other coating? I ask because most of the MFR's will coat their bare headers with crap paint to keep them from rusting. As soon as they see heat the coating is gone. I've often wondered why they don't use a hi temp paint. I would gladly pay 20 or 30.00 more so I didn't have to strip the crap off.
Your comment and pictures make me strongly suspect you got the ""Rust prevention" coating. If not, I'd be calling TTI

Not as much as it was turning my monitor over.