Higher EGTs with ceramic coating?

I actually talked to my powder coater about this very subject a few weeks ago, He said the temperature rise inside the header is minimal with a Ceracoat (ceramic) coating, it's mainly cosmetic, and probably the best choice. He also said there are crappy brands of coating that don't last very long, he said Ceracoat gave him the best results. There is a small amount of heating, but not much, so I wouldn't worry about EGT's. With bikes the pipes are out in the open, so they cool pretty well. Now if you fiberglass wrap the exhaust, that will trap some heat inside, while cooling off the outside, like in an engine bay or turbo body. I wrapped the chambers on a old RD400 and it made a big difference were they traveled close underneath the engine.

He equated it like this: Ceracoat was like sleeping under a thin sheet, and the fiberglass wrap was like sleeping under a thick blanket.