This is a new old stock set of  PFC 1-1/4" (32mm) x 12.91" (328mm)  direct drive mount, bedded racing rotors. Part #328.32.0054.47 & 48 for V2 style
mounting and use w/ PFC pad shape #7790 ect. Cost $900+ new! Fits Alcon, AP & Raybestos Nascar style 6 piston race calipers.