Our power disc brake conversion kits are one of the hottest sellers on the market! Includes your choice of an 8″ or9″diameter power booster. 8″ diameter power booster is standard equiptment in our kit. These systems not only upgrade your 1965Chevy Impala, Belair or Biscayneto discs, they also lower the vehicle a full 2″ without affecting steering geometry. Works with most 14″ wheels. Moves wheels out 1/8″.