This is a new old stock set of  PFC 1.65" (42mm) x 12.71" (323mm)  12 bolt, 60 vane racing rotors. Part #323.0062.42.46 for use w/ PFC ZR38 6 piston race calipers and
pad shape 7938. Rotors are mounted on PFC 5 x 5" billet aluminum new design V2 hats part# 177.778.459.13 and V2 mounting hardware. These were deep burnished by
Pro Brake Systems and are ready to race. $2k new!