Hi Jason,
The headers are mild steel and are HTS coated, Its not nice as the ceramic / Jet-Hot type coating but holds up pretty well... I thought about having a few sets coated but most people seem to just want what it takes to go fast on a budget so that's what I'm trying to provide... FYI, Its cost about $185 to do a set of long tube headers if you are interested in having them done...
Thanks for the inquiry! ;w