Wilwood Red-Caliper Rear EPB Retrofit System for 0.81-Inch Rotor Width, Includes Electronic Controls and Wiring

Red motor-operated parking calipers and their control hardware form this rear EPB retrofit package for the specified 0.81-inch rotor thickness. The existing hydraulic brakes continue to handle normal service braking. A suitable custom bracket must position each parking caliper relative to the rotor and provide room for its motor through suspension travel. Rotors and application-specific mounts are not supplied with the controller and harness. From Camarillo, California, Wilwood Engineering develops disc-brake systems for street-performance, motorsport and specialized uses. Bill Wood founded the company in 1977. Calipers, brake rotors, master cylinders, valves, fittings and brake lines form part of its range, and must be combined to match the demands of the complete brake system.

Technical Details

• Manufacturer part number: 140-15978-RD. Quantity: one kit for the stated axle/application.
• Includes paired electronic parking calipers, controller, wiring harness, switch and supplied control hardware. Custom caliper mounting brackets, rotors, hubs and hydraulic service brakes are not included.
• Parking caliper: Electronic Parking Brake; 1 piston; steel piston material. Lug mounting, red powder coat finish.
• Published piston bore: 1.25 inches. Supplied pad compound: BP-10.
• Rotor compatibility: 0.75–0.81-inch thickness, nominal 0.81 inch; rotor diameter 11.00–14.00 inches. Caliper mounting centers: 4.75 inches. Custom brackets must locate the pads correctly on the rotor.
• No replacement wheel hubs are supplied; retain or provide the documented matching hub arrangement.

Fitment & Compatibility

Universal retrofit for a custom rear parking-brake installation using 0.81-inch-thick rotors; no vehicle-specific bolt-on fitment is claimed. Confirm caliper width, mounting-center spacing, rotor diameter/contact position and clearance for the motors, wheels and suspension. Custom brackets are normally required and are not included. Retain a properly configured hydraulic service-brake system. The EPB is intended for static parking hold, not emergency stopping, and needs the documented electrical supply, fused wiring and controller installation.

Use PMB Performance’s 20+ years of parts and fitment experience when checking a modified brake layout. The installed mounting hardware and measured wheel space are more useful than model and year alone.

Manufacturer documentation: Installation instructions; Technical bulletin.

Manufacturer Warning

Applicable to brake pads only: Wilwood warns of exposure to arsenic, cadmium, hexavalent chromium compounds, lead, nickel, cobalt and antimony trioxide, chemicals known to California to cause cancer or reproductive harm. More information: P65Warnings.ca.gov.