Wilwood Polished Dynalite Front Drag Conversion with Drilled Solid Steel Rotors and Aluminum Hubs for Listed Early Ford Drum-Spindle Applications (1937–1948)

Polished Dynalite calipers distinguish this front drag conversion from the anodized version. Its 10.75 x 0.35-inch drilled steel rotors mount to the supplied aluminum hubs, with the correct original spindle and wheel-contact geometry determining fit. Wilwood Engineering is based in Camarillo, California; Bill Wood founded the company in 1977. Disc brake system design and manufacturing includes calipers, rotors, master cylinders, pressure valves, fittings and brake lines for motorsport, street-performance and specialized applications. Component selection must account for how the complete brake system mounts, operates and balances.

Technical Details

• Manufacturer part number — 140-1501-DP.
• Rotor construction and friction surface — Steel; Solid; Drilled; surface finish: Black Oxide.
• Rotor dimensions — outside diameter 10.75 in; 273.05 mm; thickness 0.35 in; 8.89 mm.
• Brake function and supply — Front Brake Kits - Drag Race; Disc braking; front axle; Sold as a kit.
• Flexline specification — Line kit included (manufacturer): None; Front line-kit reference: 220-8307.
• Hydraulic package contents — brake lines included: No; master cylinder included: No; booster included: No.
• Mechanical package contents — separate hubs included; mounting hardware included: Yes; spindles included: No.
• Front hub arrangement — aluminum direct/adapter hub assemblies for the specified drum spindle; solid drilled steel rotors.
• Nominal minimum wheel diameter — 15 in; 381 mm; verify full spoke and barrel clearance using the kit drawing.
• Wheel-stud thread — 1/2-20.
• Wheel bolt circle — 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm.
• Supplied pad compound — BP-10.
• Caliper color, finish and hydraulic inlet — Polished; Polish; inlet 1/8-27 NPT.
• Service caliper assembly — Forged Dynalite Internal; 4 pistons in each caliper; Stainless pistons; Forged Aluminium body; Lug mounting.

Fitment & Compatibility

Use the exact Ford model/year and spindle conditions below with DS198. The kit is limited to 2,800 lb when rear discs are fitted or 2,400 lb with rear drums. Hoses are separate; check any required wheel spacer or hub shield and the possible spindle-washer clearance adjustment.

The application list names 1 Ton Pickup, 1/2 Ton Pickup, 3/4 Ton Pickup, Model 74, Model 78, Sedan Delivery, Model 81 A, Model 82 A, Model 85, Deluxe, Standard, Pickup, Model 1 GA Truck, Model 11 A, Super Deluxe, Model 2 GA Special, Model 21 A Deluxe. Verify the particular year and suspension/brake option for each model. Use the fitment table below to confirm year, model, trim and brake or suspension options.

If a different master cylinder is installed, its existing pushrod assembly may need modification to suit that cylinder.

For a fitment check, give PMB Performance the vehicle details and the actual brake and suspension hardware. Our team has over 20 years of experience working through parts compatibility.

Check the Installation instructions for the full assembly and wheel-clearance requirements.

Manufacturer Warning

Applicable to 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.