Wilwood Left MC4 Cable Parking Brake Caliper with Anodized Body and 1.19-Inch Piston

The left-hand MC4 is a Wilwood cable parking caliper with a dust-booted aluminum piston and manual wear adjustment. This anodized version uses a nominal 0.25-inch rotor channel, providing a mechanically operated parking function alongside a separately selected service-brake system. From its base in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and components. Bill Wood founded the company in 1977; its motorsport, street-performance and specialized range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines.

Technical Details

• Manufacturer part number: 120-17265. Type: MC4 Mechanical caliper.
• Type III Anodize finish on a die-cast aluminum body with a forged aluminum anvil body.
• Mechanical piston count: 1. Bore: 1.19 inch; piston material: aluminum. Cable applied, with dust boot: yes.
• 4.75-inch-center floating attachment, left hand orientation. 0.67-inch holes.
• Assembly: one mechanical parking caliper, supplied with pads, noise-control shields and a steel mounting bracket. The service-brake system is separate.
• Nominal rotor width 0.25 inch; compatible width range 0.17–0.25 inch. Rotor diameter specification: 11.00–14.00 inches.
• Compatible pad profile 6407; confirm thickness and compound for the installation.
• Actuation: parking-brake cable with a 0.310-inch barrel end. Manual wear adjustment and a cable return spring are provided.
• Caliper component weight: approximately 3.8 lb.

Fitment & Compatibility

Check that the rotor and bracket locate the pads correctly throughout the sliding caliper's movement. Establish cable routing and lever position before ordering; the left-hand caliper designation and the direction of cable pull are separate installation considerations.

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

PMB Performance brings over 20 years of experience to brake-component selection. Share the installed caliper, rotor size and mounting arrangement so the relevant dimensions can be compared.