Fitment questions?
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Product details
The SRP rotor option gives this early Ford front kit drilled and slotted friction surfaces with black four-piston Dynalite calipers. It converts the documented drum spindle arrangement using supplied hubs, rotor adapters and mounting hardware. Wilwood Engineering’s disc brake systems and components serve motorsport, street-performance and specialized applications. Bill Wood founded the company in 1977; it is based in Camarillo, California. Wilwood designs and manufactures brake rotors and calipers as well as master cylinders, valves, brake lines and fittings. Selecting compatible components is essential to the complete system.
Technical Details
- Manufacturer part number: 140-8583-D
- Brake rotors: 12.19 x 0.81 inches; Iron; SRP Drilled & Slotted; vented
- Included pad compound: BP-10; pistons: stainless steel
- Caliper body: Forged aluminum; hydraulic inlet: 1/8-27 NPT
- Rotor surface finish: Black Electro Coat; rotors are not supplied burnished
- Supplied hub wheel pattern(s): 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm
- Supplied wheel studs: 1/2-20 in
- Hydraulic hoses: not included; match the separate lines and fittings to the application
- Included hub package: hubs, bearings, seals, adapters and mounting hardware; original spindles are retained
- Not included: master cylinder and brake booster
- Wheel clearance: 15-inch wheels may fit; check the complete manufacturer caliper/rotor template
- Quantity: sold as one axle kit
- Service calipers: 4-piston Forged Dynalite Internal; Black Powder Coat; lug mounting
Fitment & Compatibility
Intended for the early Ford drum-brake spindle used by the qualified 1937–1948 passenger-car, sedan-delivery and pickup applications below. The application list includes Deluxe, Standard, Super Deluxe and the individual numbered Ford models. Check the actual spindle and bearing dimensions before treating a passenger-car or truck listing as a match.
Match the bracket and hub installation to DS481. The original rubber hoses do not connect directly to the Wilwood calipers; the listed 220-8307 flexline package is separate and must be checked for length and routing.
The wheel contact surface must seat fully on the hub. If it overhangs the hub face, Wilwood requires the separate 6.60-inch-diameter x 0.20-inch steel spacer 300-11961. For stamped-steel wheels that do not overhang, Wilwood recommends the 6.15-inch x 0.09-inch hub shield 300-10716. Inspect contact surfaces and follow the wheel maker’s tightening requirements.
Check the full application table below, including its model-year splits and brake-configuration requirements.
Manufacturer Resources
- Wilwood kit specifications and wheel-clearance information
- Installation instructions and component list
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.
With over 20 years of parts and fitment experience, PMB Performance can help review the intended brake installation. Provide your VIN, wheel measurements and any modified axle or spindle details when asking about compatibility.
Vehicle Applications
| Years | Make | Model | Submodel | Model option | Front brakes | Rear brakes | Kit application | Notes |
|---|---|---|---|---|---|---|---|---|
| 1937-1947 | Ford | 1 Ton Pickup | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1937-1947 | Ford | 1/2 Ton Pickup | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1937-1947 | Ford | 3/4 Ton Pickup | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1937 | Ford | Model 74 | Base | All Tudor / Fordor / SW | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1937 | Ford | Model 78 | Base | All Tudor / Fordor / SW | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1937-1942, 1946-1947 | Ford | Sedan Delivery | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1938 | Ford | Model 81 A | All Tudor / Fordor / SW | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 | |
| 1938 | Ford | Model 82 A | All Tudor / Fordor / SW | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 | |
| 1938 | Ford | Model 85 | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1939 | Ford | Deluxe | Base | All Tudor & Fordor (922A) | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1939-1940 | Ford | Standard | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1940-1941, 1946-1948 | Ford | Deluxe | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1940 | Ford | Pickup | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1941 | Ford | Model 1 GA Truck | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1941 | Ford | Model 11 A | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1941-1942, 1946-1948 | Ford | Super Deluxe | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1942 | Ford | Model 2 GA Special | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
| 1942 | Ford | Model 21 A Deluxe | Base | Base | Drum | Drum | Front Kit | 1, 2, 3, 4, 5, 6 |
Application Notes
- Kit may fit some 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
- Universal Flexline kits available: 220-7056 (14"), 220-7699 (16") or 220-8307 (18"). Choose correct length for your application.
- Master Cylinder may require modification to existing pushrod assembly to install.
- This front brake kit contains no parking-brake mechanism. Parking-brake cable selection belongs to the separate rear brake installation.
- Line kit included (manufacturer): None
- Front line-kit reference: 220-8307
