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#9
01-17-2020, 02:50 PM
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They look like old Cyclone or Casler headers. I used to have a set on my square body GMC short box , before they rotted out and were replaced by Headman.
They are not Appliance, that manufacturer used individual flanges and 4 hole collector flanges. Later issue Appliance had 4 hole rotating flanges before the company evolved into Blackjack headers. 
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