[rotorwrench]

Ford made high flow exhaust systems that sort of resemble headers but not in the flathead era. It was much later in the late 50s early 60s and they were generally cast iron. I'd be wanting to know what the part number on them is. Ford has a distinct numbering system for early cars up to about 1952 when they changed their prefixes to better suit the larger amount of models in the later era.