Wilwood D8-4 Red Rear Caliper for Chevrolet Corvette (1965–1982), Stock Rotor Fit

A red finish and four-piston forged body identify this rear D8-4 for 1965–1982 Chevrolet Corvette brakes. It works with the stock rotor dimensions and D8 pads, while the 1.38-inch bores maintain the rear caliper's specified hydraulic sizing. For motorsport, street-performance and specialized braking applications, Wilwood Engineering designs and manufactures calipers, brake rotors, master cylinders, valves, fittings and brake lines. The disc brake company was founded by Bill Wood in 1977 and is based in Camarillo, California.

Technical Details

• Manufacturer part number: 120-10526-RD. Component: D8-4 Caliper Rear.
• Supply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.
• Caliper weight: approximately 6.3 lb.
• Bore configuration 1.38 inches across 4 pistons; piston material: stainless steel. Hydraulic effective area: 3.00 square inches.
• Pad fit is type D8. Match the pad dimensions and compound to the rotor and intended braking conditions.
• Nominal rotor width 1.25 inch; compatible outside diameter 11.75 inches. Specified rotor-width limits: 1.17–1.25 inch.
• Construction and surface: forged aluminum housing finished in Red powder coat.
• Piston dust boots: not fitted.
• Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
• Bracket interface: 5.16-inch lug centers with 0.47-inch holes. Specified mount height: 2.99 inches; orientation: universal.

Fitment & Compatibility

Check the original mounting bracket, 11.75-inch rotor diameter and nominal 1.25-inch width. Wheel interference is possible with early JK steel wheels and some replicas; a suitable hose must end in the specified NPT fitting.

PMB Performance has worked with brake components for over 20 years. Share the required piston sizing, rotor measurements and bracket drawing for help checking the match.