Wilwood Rear GT Slotted Rotor Brake Package, Red Superlite Calipers, Chevrolet Corvette C4 (1985–1987)

GT slotted 12.88-inch rotors and BP-20 pads distinguish this red Wilwood rear brake package for the 1985–1987 Chevrolet Corvette C4. The four-piston calipers mount radially on the supplied brackets, while separate rotor hats locate on the existing hubs. The selected package uses slotted friction faces without the SRP drilled-hole pattern. 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. Its product range serves motorsport, street-performance, and specialized applications, with individual components selected to match the requirements of the complete brake system.

Technical Details

• Manufacturer part number: 140-11920-R
• Type: Forged Narrow Superlite 4R Big Brake Rear Brake Kit For OE Parking Brake
• Calipers: Forged Narrow Superlite 4R; 4 pistons per caliper; Red Powder Coat; radial mounting.
• Piston bores: 1.12, 1.12 inches; Stainless pistons. Included pad compound: BP-20.
• Rotors: 12.88-inch diameter × 1.10-inch width; GT Slotted; Spec-37 Iron; Black Electro Coat finish.
• Wheel bolt circles: 5 x 4.75 inches.
• Included: paired calipers, pads, rotor rings, hats, brackets and assembly hardware; suitable original hubs and parking shoes are retained.
• Hydraulic flex lines are separate. Master cylinder, booster and spindles are not included; retain or select suitable matching components.
• Conditional minimum wheel diameter: 17 inches. Verify the complete clearance drawing for barrel and spoke offset before purchase.

Fitment & Compatibility

Check both sides of the rear suspension against DS816 before dismantling the original brakes. Factory parking-brake shoes are retained, so their condition and adjustment remain part of the conversion. Wheel spokes must clear the caliper body as well as the rotor clearing the barrel. Order compatible hydraulic hoses independently and set caliper alignment with the specified shims. The year/model and the actual rear assembly must agree; this package does not establish coverage for every C4.

Check the individual year, model, submodel and equipment conditions in the fitment table below before ordering.

Wilwood installation documents: Installation instructions.

PMB Performance has over 20 years of brake-system experience. Contact us with your vehicle, axle or spindle details and wheel measurements for fitment help.

California Proposition 65 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.