Wilwood GT Slotted Rear Parking Brake Conversion, Red Calipers, Chevelle/442/Beaumont/Camaro/Apollo (1964–1974), C-Clip 12-Bolt

GT slotted rotors and red Superlite calipers distinguish this Wilwood rear parking-brake package for the specified original C-clip 12-bolt axle arrangement. The four-piston hydraulic calipers work with 12.88-inch friction rings and included internal parking-shoe assemblies. A measured 2.75-inch axle offset and the correct housing flange are required; matching a vehicle model name alone is insufficient. 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: 140-12964-R
• Type: Forged Narrow Superlite 4R Big Brake Rear Parking Brake Kit.
• Calipers: Forged Narrow Superlite 4R; 4-piston; Red 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 × 1.10-inch width; GT Slotted; Spec-37 Iron; Black Electro Coat surface finish.
• Rotor ventilation: 48 curved vanes.
• Rear housing end: 12 Bolt; axle offset: 2.75 inches.
• Rotor hats: Parking Brake Hat - Standard; Aluminum; Black E-Coat.
• Wheel bolt circles: 5 x 4.50; 5 x 4.75; 5 x 5.00 inches.
• Included: paired calipers, pads, rotors and mounting hardware, caliper mounting brackets, rotor hats, internal parking-shoe assemblies.
• Hydraulic flex lines are separate; select the correct fittings, length and route for the vehicle.
• Parking-brake cable connections are separate and must suit the vehicle.
• Conditional wheel minimum: 17 inches. Compare the complete wheel-clearance diagram with both barrel and spoke dimensions.

Fitment & Compatibility

Establish flange dimensions, axle retention and bearing arrangement with the manufacturer worksheet before ordering. Special ends and C-clip eliminators fall outside this kit's stated configuration. The front Ridetech spindle notes in the vehicle table require separate rear-application confirmation. Select the hydraulic lines and parking cable connections for the actual vehicle, then set shoe clearance and caliper alignment. Confirm the full wheel envelope and the rear package's hydraulic relationship to the front brakes.

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

Wilwood installation documents: Installation instructions, Technical bulletin.

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.