Denny.......he's referring to Ceramic coatings.
These are done by a company called H.P.C. in Australia and the coatings are made from a ceramic substance.
http://www.hpcoatings.com.au/Just like the space shuttle tiles,these are very heat resistant which keeps all of the exhaust gas heat inside the pipe, not radiating off into your engine bay.
They come in a few different finishes....black, silver, mirror finish etc.
