TTI vs Dougs

krazykuda said

No .003" or less is just a coating meant to make the appearance look better...

Thermal barriers are much thicker to be of any use...

.003" for a thermal barrier does as much good as pissing in the ocean to raise the water level....

Click to expand...

I agree
Over the past 45 years I have had headers with all types of coatings, none of them hold up.
I have had ceramic coated "thermal barrier" headers on street cars, never could prove that they had an advantage. They are impossible to touch up if chipped.
The only headers I really care for a stainless steel, no coating.