Wilwood Front Black Six-Piston Brake Conversion, 12.88-Inch GT Rotor/Hub Package for ProSpindle

This Wilwood front Challenge Series package is configured for the Wilwood ProSpindle mounting arrangement. Black six-piston Superlite calipers work with GT slotted 12.88-inch one-piece rotors, new hubs and BP-10 pads. It is a component-specific suspension/brake combination rather than vehicle-model fitment by itself. 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: 140-12276
• 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; 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

Compare the installed ProSpindle and its hub journals to DS869 before choosing the kit. Verify wheel bolt circle, bearing fit and the published per-side mounting offset on the completed suspension. A different aftermarket spindle is not made compatible by sharing a similar chassis application. Select suitable hydraulic hoses separately and check their route at full lock. The conditional minimum wheel diameter is 17 inches, with both spoke depth and barrel clearance requiring the full drawing.

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.