Wilwood Black Superlite Front Conversion with 12.19-Inch SRP Rotor/Hubs for Five-Lug GM Truck and SUV Iron ProSpindles (Listed 1963–1987 Applications)

Black six-piston Superlite calipers clamp drilled/slotted 12.19-inch rotors in this five-lug GM truck front kit. The rotor/hub arrangement and bracketry depend on Wilwood's one-piece iron Pro Drop spindle being installed. BP-10 pads accompany the service brakes, while flexible lines must be selected separately. Check wheel pattern and the documented year-dependent track change before setting the final wheel offset. From Camarillo, California, Wilwood Engineering develops disc-brake systems for street-performance, motorsport and specialized uses. Bill Wood founded the company in 1977. Calipers, brake rotors, master cylinders, valves, fittings and brake lines form part of its range, and must be combined to match the demands of the complete brake system.

Technical Details

• Manufacturer part number: 140-15940-D. Quantity: one kit for the stated axle/application.
• Mounting hardware and the specified pads are included. Spindles, master cylinder and brake booster are not supplied.
• Service caliper: Forged Narrow Superlite 6R; 6 pistons; stainless piston material. Radial mounting, black powder coat finish.
• Published piston bores: 1.75, 1.25, 1.25 inches. Supplied pad compound: BP-10.
• Caliper hydraulic inlet: 1/8-27 NPT.
• Rotor specification: 12.19-inch outside diameter × 1.10-inch thickness; SRP drilled & slotted faces. Iron construction; SRP Drilled Rotor design; published vane configuration: 32 V.
• Supplied hub assembly: Hub - Hat Mount, aluminum, bare finish.
• Wheel mounting patterns: 5 x 4.75; 5 x 5.00 inches.
• Minimum nominal wheel diameter: 15 inches. The wheel must also clear the actual caliper and rotor profile in the installation drawing.
• Brake hoses are not included. Manufacturer line-kit reference(s), sold separately: 220-7056, 220-11237, 220-12168.

Fitment & Compatibility

These application rows require Wilwood C10 one-piece iron Pro Drop spindles; the kit will not fit original equipment spindles. The listed GM trucks and SUVs span specific 1963–1987 model ranges, so check the exact row and installed spindle. Relative to the original brakes and spindle, Wilwood specifies wheel movement of 0.41 inch outboard for 1963–1970 and 0.06 inch inboard for 1971–1987. Match the five-lug 5 × 4.75 / 5 × 5.00-inch wheel interface and allow for the resulting wheel position when checking fender, suspension and brake clearance. Spindles and flexible lines are not included. Use the complete application table below for the individual year, submodel, brake configuration and note attached to each entry.

Use PMB Performance’s 20+ years of parts and fitment experience when checking a modified brake layout. The installed mounting hardware and measured wheel space are more useful than model and year alone.

Manufacturer documentation: Installation instructions.

Manufacturer Warning

Applicable to brake pads only: Wilwood warns of exposure to arsenic, cadmium, hexavalent chromium compounds, lead, nickel, cobalt and antimony trioxide, chemicals known to California to cause cancer or reproductive harm. More information: P65Warnings.ca.gov.