Wilwood Front Drilled/Slotted Disc Conversion with Black Six-Piston Calipers, Early Ford Drum-Spindle Cars and Trucks (1937–1948)

Black Dynapro six-piston calipers clamp drilled/slotted 12.19-inch rotors in this Wilwood early-Ford front package. Replacement hubs adapt the friction assembly to the specified drum-spindle arrangement. The broad range of Ford bodies and trucks makes the actual spindle identification more useful than a general model-year assumption. 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 for motorsport, street-performance, and specialized applications.

Technical Details

• Manufacturer part number: 140-10739-D
• Type: Forged Dynapro 6 Big Brake Front Brake Kit (Hub)
• Calipers: Dynapro 6; 6 pistons; Black Powder Coat.
• Bores: 1.62, 1.38, 1.38 inches. Pads: BP-10.
• Rotors: 12.19-inch diameter × 0.81-inch width; SRP Drilled & Slotted, Iron, Black Electro Coat. 32 vanes.
• Hubs: Hub - Vented Rotor Offset; Aluminum; Bare.
• Wheel bolt circles: 5 x 4.50; 5 x 4.75 inches.
• Included: paired calipers, pads, rotors, brackets and assembly hardware, replacement hubs.
• Not included: hydraulic lines, master cylinder, booster or spindles. Reuse suitable matching components.
• Conditional wheel minimum: 15 inches. Check the clearance drawing for barrel and spoke offset.

Fitment & Compatibility

Confirm the exact Ford model/year row and compare spindle and bearing dimensions with DS641. The stated early-Ford mounting arrangement must still be present on a modified car. Check wheel studs and hub registration, then select hydraulic lines separately. Inspect the existing pedal and master-cylinder pushrod layout for compatibility and verify the complete wheel profile with the clearance drawing.

Match the individual model, year, submodel and brake configuration in the fitment table below.

PMB Performance has over 20 years of brake-system experience. Contact us with the vehicle and installed hardware details 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.