if you dont mind, may i ask at what price were you able to get the header for, and how much is jet hot charging you for the ceramic coating?
just thought i would ask because i recently scored a thunder header one here, had it ceramic coated "grey ice" color for $160 (3 year warranty). One of the guys from the shop helped me install it for free too.
real nice guy... since i had to get it coated twice, and installed twice. The color I chose cures after 3 heat cycles. But for some reason, the header "gassed out" around the welds, causing the ceramic coating to bubble and chip. Luckily I was covered under the warranty and they redid it for free.
I hope the same thing doesnt happen to you, but either way, having it coated is worth every penny, and hopefully the AWR header fits properly... seeing as how sometimes parts off ebay arent the greatest or what they say they are.