Wilwood Front 13.06-Inch Drilled/Slotted Rotors with Black Superlites — Selected Ridetech-Hub GM (1962–1982), Corvette C5/C6 (1997–2013) and XLR (2004–2009)

This 13.06-inch SRP option uses black six-piston Superlite calipers and BP-10 pads. The drilled/slotted rotor kit must be matched to either the documented Corvette/XLR installation or the required Ridetech hub spindle on a classic GM vehicle. Wilwood Engineering’s disc brake systems and components serve motorsport, street-performance and specialized applications. Bill Wood founded the company in 1977; it is based in Camarillo, California. Wilwood designs and manufactures brake rotors and calipers as well as master cylinders, valves, brake lines and fittings. Selecting compatible components is essential to the complete system.

Technical Details

• Manufacturer part number: 140-8921-D
• Brake rotors: 13.06 x 1.25 inches; Spec-37 Iron; SRP Drilled & Slotted; vented
• Included pad compound: BP-10; pistons: stainless steel
• Caliper body: Forged aluminum; hydraulic inlet: 1/8-27 NPT
• Rotor surface finish: Black Electro Coat; rotors are not supplied burnished
• Rotor/hat wheel-stud clearance pattern(s): 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; the existing hub/axle pattern is retained
• Hat/rotor stud-hole clearance: 0.520 in; 13.21 mm; this is not a wheel-stud thread designation
• Hydraulic hoses: not included; match the separate lines and fittings to the application
• Kit includes calipers, rotors and mounting hardware; replacement hubs and spindles are not included
• Not included: master cylinder and brake booster
• Wheel clearance: 17-inch wheels may fit; check the complete manufacturer caliper/rotor template
• Quantity: sold as one axle kit
• Service calipers: 6-piston Forged Narrow Superlite 6R; Black Powder Coat; radial mounting

Fitment & Compatibility

For 1997–2013 Chevrolet Corvette C5/C6 and 2004–2009 Cadillac XLR applications as listed. The classic 1962–1982 GM entries require the specified Ridetech hub spindles; they are not approvals for those vehicles’ original spindles. Match the exact Corvette/XLR brake package or the installed aftermarket spindle before purchase.

The 13.06-inch package retains the existing hub. Use DS502 and its wheel template to confirm clearance and bracket alignment. Hydraulic lines are separate and must suit the specific chassis; Corvette hose references must not be assumed suitable for a modified classic GM car.

Check the full application table below, including its model-year splits and brake-configuration requirements.

Manufacturer Resources

• Wilwood kit specifications and wheel-clearance information
• Installation instructions and component list

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.

With over 20 years of parts and fitment experience, PMB Performance can help review the intended brake installation. Provide your VIN, wheel measurements and any modified axle or spindle details when asking about compatibility.

Vehicle Applications

Application Notes

1. Universal Flexline kits available: 220-7056 (14"), 220-7699 (16") or 220-8307 (18"). Choose correct length for your application.
2. This front brake kit contains no parking-brake mechanism. Parking-brake cable selection belongs to the separate rear brake installation.
3. Line kit included (manufacturer): None
4. Front line-kit reference: 220-8176, 220-9100, , , 220-12168