Ken those are my roller rotors. 1993 ford factory 9" ranger rotors adapted to the mustang 2 spindles. I'm working on my brakes as we speak. Going to start life with a 13" Cobra rotor and twin piston calipers on the front and 12" rear rotors and calipers. Until I can save up the $3500 for the wilwoods they should do their job well enough.