Wilwood Front Red Dynapro SRP Brake Conversion, Early Ford Car/Truck Drum Spindles (1937–1948), 12.19-Inch

This red Wilwood early-Ford kit combines Dynapro 6 calipers with drilled/slotted 12.19-inch rotors and replacement hubs. The mounting brackets suit the specified drum spindle, while the new six-piston calipers provide hydraulic service braking. A changed front axle or spindle must be evaluated on its own dimensions. 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-DR
• Type: Forged Dynapro 6 Big Brake Front Brake Kit (Hub)
• Calipers: Dynapro 6; 6 pistons; Red 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

Use the individual Ford model and body-style row and verify the actual spindle against DS641. Check the hub-bearing interfaces, wheel bolt circle and register before assembling the rotors. Hydraulic hoses are separate from the kit. Inspect pedal travel and any pushrod adaptation required by the chosen master cylinder, then compare the wheel barrel and spokes with the template.

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.