Wilwood Black Left MC4 Cable Parking Caliper with Right-Pull Lever and Offset Mounting Plate

The black left-hand Wilwood MC4 is a mechanical parking caliper using a right-hand cable lever and offset mounting plate. A dust-booted aluminum piston and manual adjuster allow it to maintain pad contact clearance as the parking-brake friction parts wear. Bill Wood established Wilwood Engineering in 1977. Based in Camarillo, California, the company designs and manufactures disc brake systems for motorsport, street-performance and specialized use, including calipers, brake rotors, master cylinders, valves, fittings and brake lines.

Technical Details

• Manufacturer part number: 120-17477-BK. Type: MC4 Mechanical caliper.
• Attachment geometry: floating caliper on an offset mounting plate mount with 2.00-inch centers; left hand. 1.20-inch mounting height.
• Rotor dimensions: outside diameter 11.00–14.00 inches; nominal width 0.81 inch, with width limits of 0.70–0.81 inch.
• Pad fit uses shape 6407. Match the pad to the rotor and intended operating conditions.
• Mechanical piston count: 1. Bore: 1.19 inch; piston material: aluminum. Cable applied, with dust boot: yes.
• Actuation: parking-brake cable with a 0.310-inch barrel end. Manual wear adjustment and a cable return spring are provided.
• Construction and surface: die-cast aluminum body with a forged aluminum anvil, finished in Black Powder Coat.
• Assembly: one mechanical parking caliper, supplied with pads, noise-control shields and a steel mounting bracket. The service-brake system is separate.
• Caliper component weight: approximately 3.3 lb.

Fitment & Compatibility

Check the offset plate with its mounting holes on 2.00-inch centers and compare the rotor midline with the assembly drawing. Match the cable barrel and lever stroke, then confirm the wheel and suspension leave room for the body and cable housing.

Manufacturer warning, brake pads only: Cancer and Reproductive Harm. P65Warnings.ca.gov.

For help matching this caliper, contact PMB Performance with the brake-package details and rotor measurements. Our team has more than 20 years of experience with brake parts and fitment.