Unrelated but related, I had an issue with tti coated headers, they started to rust.
I read through the warranty and I had no interest in r&r, be out of a car, box up, send back, etc. Especially because 2 of the bolts are a royal pain.
Sent them an email stating that, adding I don't want anything but for them to offer a better coating on the poly headers for the next customer, as they didn't offer the same coating as bb headers.
2 weeks later I received an email, they're sending me new headers with their top of the line coating. I called to buy new gaskets, as it's a 318 poly and not a common gasket. Their reply, we're sending you everything, headers, gaskets, bolts, enjoy.