For GM 10 and 12 bolt rear ends in mid size cars. Bolt Pattern: 5 on 4.5" | 4.75". Brake Parts. This disc brake conversion kit does not fit all 10-bolt or 12-bolt rear axles. It is not compatible with full-size GM car axles, such as those on Biscayne, Bel Air, or Impala, and does not fit rear axles from GM pickup trucks.
