Wilwood Front Black Caliper/SRP Conversion, Ford Pinto/Mustang II and Mercury Bobcat 1974–1980, 12.88-Inch Rotors and Five-Lug Hubs

Black Superlite 6R calipers and drilled/slotted 12.88-inch rotors form this Wilwood five-lug front package. Replacement hubs, bearings and BP-10 pads are included for the specified Ford/Mercury disc-spindle mounting. The vented one-piece rotors and caliper brackets are part of a matched conversion rather than a direct replacement for an original four-lug rotor. 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. Its product range serves motorsport, street-performance, and specialized applications, with individual components selected to match the requirements of the complete brake system.

Technical Details

• Manufacturer part number: 140-12275-D
• Type: Forged Narrow Superlite 6R Big Brake Front Brake Kit (Hub and 1PC Rotor)
• Calipers: Forged Narrow Superlite 6R; 6 pistons per caliper; Black Powder Coat; radial mounting.
• Piston bores: 1.62, 1.12, 1.12 inches; Stainless pistons. Included pad compound: BP-10.
• Rotors: 12.88-inch diameter × 1.10-inch width; SRP Drilled & Slotted; Iron; Black Electro Coat finish.
• Wheel mounting change from OE: +0.55 inches per side; check wheel offset and fender clearance.
• Replacement hubs: Hub - Hat Mount; Aluminum; Bare. Bearings and hub hardware are specified in the installation instructions.
• Wheel bolt circles: 5 x 4.50; 5 x 4.75 inches.
• Included: paired calipers, pads, rotors, brackets and assembly hardware, replacement hubs and bearings.
• Hydraulic flex lines are separate. Master cylinder, booster and spindles are not included; retain or select suitable matching components.
• Conditional minimum wheel diameter: 17 inches. Verify the complete clearance drawing for barrel and spoke offset before purchase.

Fitment & Compatibility

Use the individual Pinto, Mustang II and Bobcat entries and verify the installed spindle against DS868. Only the stated five-lug bolt circles are supported; original four-lug wheels are not compatible with these hubs. Check the outward wheel movement against tire and fender clearance and confirm any drop-spindle application separately. Choose suitable hydraulic lines in addition to the kit. A nominal 17-inch wheel still needs enough barrel and spoke space for the complete caliper section.

Check the individual year, model, submodel and equipment conditions in the fitment table below before ordering.

Wilwood installation documents: Installation instructions.

PMB Performance has over 20 years of brake-system experience. Contact us with your vehicle, axle or spindle details and wheel measurements 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.