A/M Headers flange

[HawkX66]

I'm looking at this set of used ceramic coated Hedman headers for cheap. They have the p/s box dent in them and another dent at #2 cyl, but otherwise are real nice.
My question is, has anyone seen the round collector flange? I'm used to seeing the triangle 3 bolt one that bolts to my exhaust.
I figured for $100 you can't go wrong, but if the flange is that different I don't know if they'd work. They're 1 1/2 hr drive so I won't know until I actually see them.

Any ideas? Thanks!