I have used Swain Technology for coating the headers and side pipes. The web site explains their process. Would appear the term “ ceramic “ has become generic when describing various coatings. Available only in white, I have sprayed the parts with high temp black. The finish is not smooth , can be compared to sand paper, which Swain refers to as the ceramic material. While there are a number of good coatings, provides a base for comparison on materials, process, finish, etc.
White Lightning Exhaust Coatings | Swain Tech Coatings | Industrial Coatings | High Performance Racing Coatings
Have an extra set of new CR I headers, not coated, purchased directly from Don Scott which were ordered for a 351W with GT 40 heads. Do not know the compatibility with other heads/engines, and intended to bolt up to the CR I factory side pipes.