XJ6 & XJ12

Brake system utilizes four wheel disc brakes and a tandem master cylinder connected to a power servo unit. Master cylinder provides separate hydraulic circuits for front and rear brake calipers. Front calipers are mounted on stub axle carriers and rear calipers are mounted inboard on differential housing, with rotors connected to differential drive flanges. Each front caliper consists of three pistons (two outboard, one inboard), and each rear caliper consists of two opposing pistons. Parking brake consists of independent lever-operated calipers mounted on service brake calipers. Parking brake calipers operate on service brake rotors.