Wilwood Rear Drilled-Rotor Conversion with Black Parking Calipers, Ford Focus ST (2013–2018), 12.88-Inch Rotors

This Wilwood Focus ST rear conversion pairs black CPB calipers with drilled/slotted 12.88-inch rotors on separate hats. The single-piston calipers provide hydraulic braking and a mechanically operated parking function. The selected package includes BP-10 pads, rear hoses and the required mounting components, with correct factory hub and parking-cable connections essential to the completed installation. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings, and brake lines for motorsport, street-performance, and specialized applications.

Technical Details

• Manufacturer part number: 140-13031-D
• Type: Combination Parking Brake Caliper Rear Brake Kit.
• Calipers: Combination Parking Brake; 1-piston; Black Powder Coat.
• Piston bore dimensions: 1.34 inches; steel pistons. Caliper mounting: radial.
• Included pad compound: BP-10.
• Rotors: 12.88-inch outside diameter × 0.81-inch width; SRP Drilled & Slotted; Iron; Black Electro Coat surface finish.
• Rotor ventilation: 48 curved vanes.
• Rotor hats: Big Brake Hat - Flared Bell; Aluminum; Black E-Coat.
• Wheel bolt circles: 5 x 4.25; 5 x 4.50 inches.
• Included: paired calipers, pads, rotors and mounting hardware, caliper mounting brackets, rotor hats.
• Application-specific hydraulic flex lines included.
• Conditional wheel minimum: 17 inches. Compare the complete wheel-clearance diagram with both barrel and spoke dimensions.
• Required parking-cable adaptation: modify the new caliper cable bracket to accommodate the original cable end, following DS977 before installation.

Fitment & Compatibility

Confirm the vehicle's ST trim and year, then inspect the hub and cable arrangement before assembly. Follow the bracket and caliper-positioning procedure and adjust the parking mechanism without preloading the levers. Verify full release and free rotor movement. Compare the wheel with the complete clearance drawing rather than relying on a 17-inch diameter alone. Secure the flex lines through suspension movement and check front/rear hydraulic balance alongside the retained front brakes.

Match the individual year, model, submodel and equipment conditions in the fitment table below.

Wilwood installation documents: Installation instructions.

PMB Performance has over 20 years of brake-system experience. Contact us with the vehicle and installed hardware details for help confirming the complete setup.

Manufacturer warning, brake pads only: WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.