They are mandrel bent it looks like, and i just picked up a set for 25 in perfect shape polished staniless steel. They look really nice, and i plan on having them fitted where they can be clamped on for when i want to run tails and unclamped for when i don't. Also gonna have a set of dumps made up to fit the muffs, so that i can go between open muffs, dumps, and the tailpipes has anyone tried this, if so what was the outcome. i just want to be able to change the setup at will if i get tired of it being loud for a while clamp on the tails if too quiet then take them off for the dumps or for really loud just run the muffs open.