Wilwood Rear Four-Piston Caliper/Rotor Conversion, Black, FR-S/BRZ/86/GR86 (2013–2024), 12.88-Inch GT Friction Rings

Black Superlite 4R calipers and 12.88-inch GT slotted rotors provide the rear brake package in this Wilwood conversion for the listed FR-S, BRZ, 86 and GR86 models. It uses the compatible original parking-brake mechanism rather than adding a new cable-operated caliper. The selected rotor hats, four-piston calipers, pads and rear flex lines must be installed with the specified original hub arrangement. 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: 140-12871
• Type: Forged Narrow Superlite 4R Big Brake Rear Brake Kit For OE Parking Brake.
• Calipers: Forged Narrow Superlite 4R; 4-piston; Black Powder Coat.
• Piston bore dimensions: 1.12, 1.12 inches; stainless pistons. Caliper mounting: radial.
• Included pad compound: BP-10.
• Rotors: 12.88-inch outside diameter × 0.81-inch width; GT Slotted; Iron; Black Electro Coat surface finish.
• Rotor ventilation: 48 curved vanes.
• Rotor hats: Parking Brake Hat - Standard; Iron; Black E-Coat.
• Wheel bolt circles: 5 x 3.93; 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.

Fitment & Compatibility

Confirm model year and trim against the table, then inspect the original parking shoes, cables and supporting hardware for correct operation. The conversion must align with the factory hub and parking-brake geometry. Follow the rear bracket and caliper shimming procedure and check free rotor rotation after adjustment. Use the wheel template to establish clearance of the actual rim. Front/rear hydraulic balance must be checked with the front brake package already installed on the vehicle.

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.