I can't tell from the pics but if those are individual flanges, more then likely Mac's. So far Mac's are the only individual flange headers for our cars from what I remember. Make sure those headers have the EGR bung for our cars, I don't see it from the pics.
My MACs have ball and socket collector flange not three bolt. Cylinder #1 has the EGR bung. My driver side looks different. Cylinder 7 and 8 go back towards the firewall first not down.
On mine the header flanges did not line up perfect. When I had the motor out I looked at the flanges to determine which way I had to move the primary tube to get the holes to line up. It is a lot easier with the motor out of the car.
I'm with gregbar. Macs have ball and socket joints with only two bolts to connect, not three. Both of my mac longtube sets are two bolts connecting to pro chamber.
Ok I don't think they are MAC headers. They also don't look like they are for a 94-95 either. They might be for 93 down. The 94-95 have a EGR spout on one of the tubes and I couldn't see one in the pic. The 93 down will work but you can't hook up the EGR.
they look pretty similar to my MAC except for the driver side, yes MAC uses a ball socket joints and 2 bolt to connect to the midpipe
im say they are Mac.