Wilwood Front Brake Package with Red Dynapro Radial Calipers, 11.75-Inch Drilled/Slotted Rotors and Hubs for GM AFX ProSpindle Conversions (Listed 1964–1974 Applications)

Red radial-mount Dynapro calipers and drilled/slotted rotor rings give this front hub kit its specified configuration. The 11.75-inch vented rotors use separate adapters, with BP-10 pads and bearing hardware included. It is intended for the listed GM vehicles with Wilwood AFX ProSpindles installed. Brake hoses are not part of this kit, so connection type and length must be selected for the completed conversion. Wilwood Engineering, founded by Bill Wood in 1977, designs and manufactures disc brake systems from its Camarillo, California base. Motorsport, street-performance and specialized applications use its calipers, rotors, master cylinders, valves, fittings and brake lines. Correct component selection depends on the requirements of the entire braking system.

Technical Details

• Manufacturer part number: 140-15909-DR. Quantity: one kit for the stated axle/application.
• Rotor specification: 11.75-inch outside diameter × 0.81-inch thickness; SRP drilled & slotted faces. Iron construction; SRP Drilled Rotor design; published vane configuration: 32 V.
• Service caliper: Dynapro Radial Mount; 4 pistons; stainless piston material. Radial mounting, red powder coat finish.
• Published piston bores: 1.75, 1.75 inches. Supplied pad compound: BP-10.
• Caliper hydraulic inlet: 1/8-27 NPT.
• Supplied hub assembly: Hub - Vented Rotor Offset, aluminum, bare finish.
• Wheel mounting patterns: 5 x 4.50; 5 x 4.75 inches.
• Minimum nominal wheel diameter: 15 inches. The wheel must also clear the actual caliper and rotor profile in the installation drawing.
• Mounting hardware and the specified pads are included. Spindles, master cylinder and brake booster are not supplied.
• Brake hoses are not included. Manufacturer line-kit reference(s), sold separately: 220-7056.

Fitment & Compatibility

Use only with the documented Wilwood AFX ProSpindles on the listed GM A-, F- and X-body applications. The manufacturer identifies the primary groups as 1964–1972 A-body, 1967–1969 F-body and 1968–1974 X-body; individual rows retain their specific year and model limits. The required aftermarket spindles are not included, and original spindles are not an equivalent interface. Verify wheel-bolt pattern, hub contact surface, caliper clearance and the completed hydraulic balance. The wheel mounting surfaces must seat fully on the hub; follow the installation sheet’s spacer requirement if a wheel contact surface overhangs the hub face. Use the complete application table below for the individual year, submodel, brake configuration and note attached to each entry.

Ask PMB Performance to review the brake configuration if the vehicle has been modified. Our 20+ years of parts and fitment experience help identify the axle, spindle and wheel details that need to match before the kit is selected.

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.