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Yes they do

http://www.qccoatings.com/wherewereat.php



Hate to rain on your parade, but QC has never coated the inside of headers nor do most other shops. If you ask the right questions you'll get the right answer. Bill will tell you that they only spray inside the collector and primary area as far as you can see.

This is NOT ID coating. Even if it were done throughout with Bright Ceramic, in most situations Bright Ceramic would not stick to the inner primaries because it can't be prepped sufficiently. ID coatings are done with a different thermal barrier that is capable of bonding to less than ideal part prep.

CCPcoatings.com



Are you saying it doesnt bite to new tubing.. all the
headers I have done are new tubing





Not at all, it doesn't have anything to do with new or used tubing. Bright Ceramic is VERY sensitive to preparation and coating thickness. In order to get Bright Cerm to bond properly the substrate has to be profiled in a very specific way which is rarely possible past your first bend. If it isn't the Ceramic will either flake off in the polishing process or blow out with the exhaust. Further, if the material is put on too thick, like someone flow coating it, it will again just flake off. Like I said, the bright shiny you see in your collector and head flange ends just past your line of sight. Jet Hot blew smoke up people butt with this BS for years.