Has anyone who is running the MAC headers had problems with the HTS coating on them. I hear it is not as good as Ceramic coating. Some info would be helpful.

 

No problems so far no. a few spots ahve worn off and there is a little rust, and some rust on the sratches from putting them on. Ceramic coating is more durable plus keeps the heat down in your engine bay. The high temp coating on the macs is just for looks and prolongs the rust look IMO