Has anyone ever seen a pair of these? Apear to be built for a scrambler... What is the benefit of the expansion in the header? I have only seen large expansions in 2 stroke dirtbikes. Check it out

Gotta vent here cause I can't do it on ebay. I hate these guys on ebay who will disassemble bikes to the smallest part possible. Vintage carbs and other items that could be servicable will end up in the trash bin because most folks don't want a disassembled throttle plate, screws and rod. I...