Wilwood Black Superlite 4R 12.88-inch SRP Rear Kit for Corvette C5/C6 1997–2013 and Cadillac XLR 2004–2009

Black radial-mount calipers accompany SRP rear rotors while retaining the OE parking arrangement. The supplied black powder-coated 4-piston calipers and 12.88-inch SRP drilled-and-slotted rotors are configured for Chevrolet Corvette C5/C6 and Cadillac XLR. Wilwood Engineering began in 1977 under founder Bill Wood and is based in Camarillo, California. The company designs and manufactures disc brake systems and components for motorsport, street-performance and specialized vehicles. Calipers, rotors, master cylinders, valves, fittings and brake lines must be selected around the needs of the complete system.

Fitment & Compatibility

The listed Corvette C5/C6 applications span 1997–2013, and Cadillac XLR coverage runs from 2004–2009. This rear package retains the OE parking-brake and ABS functions when installed as directed. Its four-piston Superlite 4R calipers use radial mounting and work with 12.88 x 1.00-inch Spec-37 rotors. DS458 uses a rounded 12.90-inch heading, while the exact current rotor specification is 12.88 inches; the dimensions in this listing follow the current rotor data. Match the specific model and trim entry before ordering and verify the wheel profile against the instruction drawing. The existing rear hubs and parking components should be inspected during installation. Brake lines are separate, and the correct listed flexline reference depends on the vehicle application.

Use the complete vehicle row and its application notes below to check model year, trim and original brake equipment.

Technical Details

• Manufacturer part number: 140-8032-D.
• Calipers: 4 pistons; forged aluminum; stainless steel pistons.
• Caliper attachment: radial mount; 1/8-27 NPT hydraulic inlet.
• Caliper finish: Black Powder Coat.
• Rotor/hat wheel-stud clearance patterns: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm.
• Rotor/hat stud-hole clearance diameters: 0.520 in; 13.21 mm. These are hole sizes, not wheel-stud thread specifications.
• The rotor/hat drilling does not change the vehicle hub or axle wheel bolt pattern.
• Rotor dimensions: 12.88 in; 327.15 mm diameter x 1.00 in; 25.4 mm thick.
• Rotor construction: Spec-37 Iron; vented; SRP Drilled & Slotted friction surface.
• Sold as one kit. Mounting hardware is included. Hubs are not included.
• Brake pads are included; use the compound and installation instructions specified for this rotor package.
• Spindles, master cylinder, brake booster and hydraulic brake lines are not included.
• Housing/flange arrangement: OEM.
• Wheel-size guide: 17 in; 431.8 mm minimum nominal diameter; verify actual template clearance.

Package and installation requirements

• The current rotor specification is 12.88 x 1.00 inches. The DS458 cover rounds the diameter to 12.90 inches.
• Hydraulic lines are separate; Wilwood references 220-8177 and 220-9101 according to the application.

Manufacturer references

• Wilwood product and configuration information
• Installation instructions

With over 20 years of experience, PMB Performance can help you work through the mounting and brake-system details before ordering. Include your vehicle information and any axle, hub or spindle changes when contacting us.

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.

Vehicle Applications

Application Notes

1. Line kit included (manufacturer): None
2. Rear line-kit reference: 220-8177, 220-9101