Small Block Fenderwell Header ID...Anyone Recognize These?

[66340SEDAN]

I have these vintage small block fenderwell headers....anyone know what brand they are? Do they fit all A-body cars? I’m guessing with this type of collector they are probably race headers? I didn’t measure the pipes but they are fairly big in diameter compared to my old cyclone ones I have...and they are a longer tube design too. The rear pipe is loose, it slips in at the bottom and somewhat adjustable. They have never been run, used to have a paper tag on each collector but they have mostly worn off and can’t read them, also couldn’t find any stamping or other markings on them. Any help would be great, thanks!!

 

[abdywgn]

Hooker header versions for the 67 and later A-body?

 

[Syleng1]

Weird bends for an Abody I’m guessing.
Maybe a rail or sand buggy? Brand? Who knows but somebody on here could recognize if given enough time.
Heck some will even tell you the day and time they were made and by who! Lol!
Sorry I was not more help other than an educated guess.

 

[33IMP]

The single tube under the car will be the giveaway. Definitely a race header with no collector flange (had to add a flange to both my custom header, and my hooker super comps.)
Those could be a custom, non-name brand header. I have a custom set of big block A-body headers that are similar. (They don't have flanges either).