Wilwood Front Black 12.88-Inch Drilled/Slotted Superlite Kit for Later GM Disc Spindles (1979–1990)

Drilled/slotted 12.88-inch rotors distinguish this Wilwood later-GM front hub package. Black six-piston calipers mount radially, with replacement aluminum hubs and separate rotor hats. The hub geometry changes the wheel mounting location by +0.17 inches relative to the stated original reference. 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 for motorsport, street-performance, and specialized applications.

Technical Details

• Manufacturer part number: 140-10492-D
• Type: Forged Narrow Superlite 6R Big Brake Front Brake Kit (Hub)
• Calipers: Forged Narrow Superlite 6R; 6 pistons; Black Powder Coat.
• Bores: 1.62, 1.12, 1.12 inches. Pads: BP-10.
• Rotors: 12.88-inch diameter × 1.10-inch width; SRP Drilled & Slotted, Spec-37 Iron, Black Electro Coat. 48 curved vanes.
• Wheel mounting change from OE: +.17 inches per side.
• Hubs: Hub - Hat Mount; Aluminum; Bare.
• Wheel bolt circles: 5 x 4.50; 5 x 4.75 inches.
• Included: paired calipers, pads, rotors, brackets and assembly hardware, replacement hubs, rotor hats.
• Not included: hydraulic lines, master cylinder, booster or spindles. Reuse suitable matching components.
• Conditional wheel minimum: 17 inches. Check the clearance drawing for barrel and spoke offset.

Fitment & Compatibility

The Chevrolet Caprice application extends to 1990 in the table, while the Camaro and Firebird entries stop earlier; the combined date span must not be applied to every model. Their relevant common interface is the later GM spindle originally carrying an 11-inch rotor. DS612 defines the required knuckle preparation. Install the correct bearings and wheel registration on the replacement hubs, allow for the +0.17-inch mounting shift and use the clearance diagram to check spoke depth before final hose routing and bleeding.

Match the individual model, year, submodel and brake configuration in the fitment table below.

PMB Performance has over 20 years of brake-system experience. Contact us with the vehicle and installed hardware details 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.