Wilwood Black Rear Left CPB Combination Caliper for 0.81-Inch-Wide Rotors

The standard black left CPB is a single rear caliper that combines hydraulic braking with a cable-actuated parking lock. Its 41mm piston operates across a nominal 0.81-inch rotor width, with the floating assembly guided by a fixed radial mounting bracket. This component comes from Wilwood Engineering, established in 1977 by Bill Wood and based in Camarillo, California. Its disc brake design and manufacturing work includes calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized systems.

Technical Details

• Manufacturer part number: 120-10112-BK. Component: Combination Parking Brake caliper.
• Supply: one CPB caliper assembly with integrated cable parking actuation. Rotor, line and parking-cable compatibility must be checked as part of the complete rear brake arrangement.
• Bracket interface: 5.98-inch radial centers with 0.39-inch holes. Specified mount height: 2.08 inches; orientation: left hand.
• Pad fit is type D340. Match the pad dimensions and compound to the rotor and intended braking conditions.
• Caliper weight: approximately 6.1 lb.
• Construction and surface: aluminum / steel housing finished in Black powder coat.
• Bore configuration 1.62 inches across 1 piston; piston material: steel. Hydraulic effective area: 2.06 square inches.
• Nominal rotor width 0.81 inch; compatible outside diameter from 11.00 through 13.00 inches. Specified rotor-width limits: 0.75–0.81 inch.
• Hydraulic inlet thread: M10 x 1.00. Use a fitting with the correct thread and sealing seat.
• Piston dust boots: included.

Fitment & Compatibility

Check 5.98-inch mounting centers, rotor diameter and the position of the parking cable. Use the exact required actuator arrangement when replacing an existing CPB; the same bore and finish are insufficient to identify every configuration.

For a replacement or custom installation, send PMB Performance the brake dimensions and existing component identification. Our 20+ years of experience can help narrow down the correct combination.