Wilwood Right MC4 Mechanical Parking Brake Caliper, Silver / 0.81-Inch Rotor Width

The silver right-hand MC4 is a separate mechanical parking-brake caliper, operated by a cable rather than hydraulic pressure. Its nominal 0.81-inch rotor-width body is supplied with a mounting bracket and parking pads. Wilwood Engineering is a Camarillo, California-based designer and manufacturer of disc brake systems, founded by Bill Wood in 1977. Calipers, brake rotors, master cylinders, valves, fittings and brake lines form its range for motorsport, street-performance and specialized applications.

Technical Details

• Manufacturer part number: 120-12069. Component: MC4 Mechanical caliper.
• Supply: one MC4 parking caliper with its mounting bracket and parking pads; the pads’ exact friction compound should be confirmed if a particular material is required.
• Silver powder coat finish on a cast aluminum caliper body.
• Hydraulic connection: none; the caliper is operated by a parking-brake cable.
• Caliper weight: approximately 3.3 lb.
• Piston dust boots: included.
• 4.75-inch floating mounting pattern, right hand; hole size 0.67 inch.
• Brake pad profile 6407; select friction material for the actual operating conditions.
• The rotor channel is specified for 0.81-inch nominal width. Rotor outside diameter: 11.00 to 14.00 inches. Specified rotor-width limits: 0.70–0.81 inch.
• 1 aluminum piston with 1.19-inch bore diameter. This piston is operated mechanically, without hydraulic pressure.

Fitment & Compatibility

Check the 4.75-inch bracket centers, 11.00–14.00-inch rotor diameter and correct cable pull direction. The lever accepts a 0.310-inch barrel end, with manual adjustment for pad and rotor wear.

PMB Performance has worked with brake components for over 20 years. Share the required piston sizing, rotor measurements and bracket drawing for help checking the match.