Wilwood 140-15978-BK Electronic Parking Brake Retrofit Kit for 0.81" Rotors

Vehicle Fitment

• Semi-universal rear electronic parking brake retrofit kit for vehicles with rear disc brakes having ~0.81" rotor width
• Designed for custom builds, restomod projects, hot rods, and vehicles requiring an integrated electronic parking brake

Features

• Complete electronic parking brake system with black powder-coat rear calipers for corrosion resistance and modern looks
• Controller unit included to provide electronic actuation and park-hold functionality
• Wiring harness and activation switch included for integration into vehicle electrical system
• Designed for ~0.81" rear rotor width applications - caliper profile matches this rotor thickness
• Eliminates traditional parking brake cables and mechanical actuators
• Excellent static holding power once engaged for secure parking on grades
• Kit suitable for custom bracket mounting on many disc rear ends (custom brackets typically required)
• Ideal for custom engine swaps and brake conversions that lack OEM electronic parking brake provision

Specifications

• Part Number: 140-15978-BK
• Type: Electronic parking brake retrofit kit
• Caliper Finish: Black powder coat
• Compatible Rotor Width: ~0.81" (20.57 mm)
• Caliper Pistons: Single piston per caliper (large bore electronic actuation)
• Brake Lines Included: No (requires brake line kit matched to application)
• Emergency Brake Control: Electronic controller and dash switch included
• Mounting: Requires custom or vehicle-specific brackets (not included)

Included Components

• 2x Rear electronic parking brake calipers (black powder coat)
• 1x Electronic parking brake controller module
• 1x Wiring harness for controller integration
• 1x Activation switch for dash mounting
• Hardware for basic assembly (vehicle-specific bracket hardware not included)

Product Description

The Wilwood 140-15978-BK Electronic Parking Brake Retrofit Kit is a professional-grade rear parking brake solution for vehicles with disc brakes and ~0.81" rear rotor width. This kit brings modern electronic parking brake functionality to custom builds and restomod projects by replacing traditional cable-operated park brakes with electrically actuated calipers mounted at the rear. The black powder-coat finish enhances durability and gives a clean performance look behind wheels.

Included in the kit are the electronic controller, wiring harness, and dash-mount activation switch, allowing you to integrate the system into the vehicle's electrical system. Unlike conventional systems, this electronic approach eliminates the need for mechanical cables and actuators, providing superior static holding power once engaged. Because it is a semi-universal retrofit solution, custom mounting brackets are typically required to adapt the calipers to your specific rear disc setup. Brake lines are not included and must be chosen to match rear axle and master cylinder configurations.