Wilwood Front GT Rotor/Hub Package, Red Calipers, Ford Mustang II/Pinto/Mercury Bobcat 1974–1980, Five-Lug Disc-Spindle Layout

GT slotted 12.88-inch rotors and red Superlite 6R calipers are selected in this Wilwood Ford/Mercury front conversion. The package supplies new hubs and bearings, five-lug wheel mounting and BP-10 pads. It must be matched to the correct disc spindle on the individual Mustang II, Pinto or Bobcat application. 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-R
• Type: Forged Narrow Superlite 6R Big Brake Front Brake Kit (Hub and 1PC Rotor)
• Calipers: Forged Narrow Superlite 6R; 6 pistons per caliper; Red 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; GT 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

DS868 identifies the spindle arrangement and the two supported five-lug circles. Check the separate model/year ranges, particularly where the front suspension has been transferred to another chassis. Allow for the published per-side outward hub movement when choosing wheel offset. Separate compatible flex hoses are needed. Measure the full wheel profile against the conditional 17-inch drawing before assembly, then set caliper centering and verify hose freedom through steering and suspension movement.

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.