Thanks!
That's kinda what I thought except that all my other Honda exhausts have stuff stamped on them, at least a part number. But this set of headers I've got, identical to those pictured, are clean as a whistle, nothing stamped on the metal at all.
Happy to say they're in perfect shape and came as extra parts on the bike. Apparently former owner took them off and installed a 4 into 1 and let those rust out instead of the originals. Works for me!!
Thanks, guys!