Wilwood GT-Slotted Rear Brake Package, Red Superlite 4R Service and MC4 Parking Calipers, Chevrolet Corvette C4 (1988–1996)

The red GT configuration combines four-piston Superlite hydraulic calipers with separate MC4 mechanical parking units. Its two-piece rotor assemblies replace the specified C4 rear brake package while retaining the original suspension hubs. Wilwood Engineering is based in Camarillo, California; Bill Wood founded the company in 1977. Disc brake system design and manufacturing includes calipers, rotors, master cylinders, pressure valves, fittings and brake lines for motorsport, street-performance and specialized applications. Component selection must account for how the complete brake system mounts, operates and balances.

Technical Details

• Manufacturer part number: 140-14883-R.
• Nominal minimum wheel diameter: 17 in; 431.8 mm; verify full spoke and barrel clearance using the kit drawing.
• Rear flange interface: OEM; axle/flange offset 0.00 in; 0 mm (distinct from rotor-hat offset).
• Hydraulic package contents: brake lines included: No; master cylinder included: No; booster included: No.
• Mechanical parking system: separate MC4 parking calipers; cables purchased separately.
• Rotor dimensions: outside diameter 12.88 in; 327.15 mm; thickness 0.81 in; 20.57 mm.
• Service caliper assembly: Superlite 4R; 4 pistons in each caliper; Stainless pistons; Forged Aluminium body; Radial mounting.
• Supplied pad compound: BP-20.
• Hat wheel-stud clearance diameter: 0.520 in; 13.21 mm.
• Rotor mounting hat: aluminum; Black E-Coat; hat offset 1.200 in.
• Mechanical package contents: no separate hubs included; mounting hardware included: Yes; spindles included: No.
• Flexline specification: Line kit included (manufacturer): None; Rear line-kit reference: 220-8177.
• Brake function and supply: Rear Brake Kits - Street Performance; Disc; Parking braking; rear axle; Sold as a kit.
• Rotor construction and friction surface: Iron; Vented; GT Slotted; surface finish: Black Electro Coat.
• Caliper color, finish and hydraulic inlet: Red; Red Powder Coat; inlet 1/8-27 NPT.
• Wheel bolt circle: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm.

Fitment & Compatibility

Identify whether the installation is a production Corvette or a custom chassis using C4 rear suspension. DS1247 specifies separate 330-14891 cables and 220-8177 hoses for the production car; custom arrangements use the matching universal cable set and individually chosen hose length.

Check the application-specific restrictions for Corvette. A shared model name does not replace the exact year and brake/suspension configuration. Use the fitment table below to confirm year, model, trim and brake or suspension options.

PMB Performance brings over 20 years of parts and fitment experience. Send the vehicle details and installed brake/suspension configuration if you need help checking this package.

Check the Installation instructions for the full assembly and wheel-clearance requirements.

Manufacturer Warning

Applicable to 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.