I think made by same guy that makes sidewinders--Nice quality--good real bronze guides--good quality seats and seat fit--nice Eddy knock off --excellent quality--lots less than Eddys when bought at right place--bout time....You can buy equal quality Chevy head for $500 a pair range so..again we get it in the shorts because we are Mopar 16 guides and seats cost same--aluminum cost same--machine work same--shipping same etc so a pattern box that takes a couple weeks--little trial and error then good to go from now on...