Winters Performance Inboard Rotor Mounts are available for Sprint/Saloon Car or Midget/MiniSprint. Larger Sprint/Saloon Car has 8 on 7″ bolt pattern to rotor (search WN2194 for Rotor Bolt Kit).
The smaller Midget/MiniSprint feature a 6 on 5.5″ bolt pattern to rotor with 38 internal splines (search WIL230-2589 for Rotor Bolt Kit)