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Product details
This Big Ford package combines red four-piston calipers with 12.88 x 1.10-inch SRP rotors. Internal parking shoes sit inside the aluminum hats, providing a cable-operated parking function alongside the separate hydraulic service calipers. Wilwood Engineering, based in Camarillo, California, has designed and manufactured disc brake systems since its founding by Bill Wood in 1977. The range spans calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications.
Technical Details
Calipers and pads
- Calipers: XRS4R; 4 pistons
- Caliper finish: Red Powder Coat
- Body construction: Forged aluminum
- Pistons: stainless
- Mounting: radial
- Hydraulic inlet: 1/8-27 NPT
- Included pad compound: BP-10
- Listed piston bore sizes: 1.12 / 1.12 in
Kit contents and separate parts
- Manufacturer part number: 140-18293-DR
- Supply: one brake kit; components for both sides of the axle
- Mounting hardware: included
- Hubs: not included
- Spindles, master cylinder and brake booster: not included
- Brake flexlines: not included
- Axle housing flange: Big Ford New Style
- Required axle/hub offset: 2.50 in; 63.5 mm
Installation documents
Rotors and mounting dimensions
- Rotors: 12.88 in; 327.15 mm diameter x 1.10 in; 27.94 mm thick; vented Spec-37 Iron
- Friction faces: SRP Drilled & Slotted
- Rotor coating/finish: Black Electro Coat
- Internal vanes: 48 curved
- Hats: Aluminum; Black E-Coat; 1.540-inch hat offset
- Rotor/hat wheel-stud clearance patterns: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm
- Stud specification: 1/2-inch wheel studs (hat clearance; verify existing axle studs)
Fitment & Compatibility
Measure the rear housing before selecting this 12.88-inch XRS4R package: it requires a Big Ford New Style flange and a 2.50-inch axle offset. Use the manufacturer's worksheet to compare the flange bolt layout, bearing diameter and axle register. The 1990 Lincoln Town Car rear-drum application in the table remains subject to those measurements. The rotor hats contain an internal-shoe parking brake. Cables, clevis hardware, adapters and hydraulic flexlines must be supplied separately; a universal cable set may require changes to the vehicle or routing. Nominal minimum wheel diameter: 17 in; 431.8 mm. The linked wheel-clearance diagram must confirm barrel and spoke clearance; wheel diameter alone does not guarantee fit.
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.
Our team at PMB Performance draws on 20+ years of brake and restoration work. We can help you review the application requirements before you assemble the system.
Vehicle Applications
| Years | Make | Model | Model option | Front brakes | Rear brakes | Kit application | Notes |
|---|---|---|---|---|---|---|---|
| 1990 | Lincoln | Town Car | All | Disc | Drum | Rear Kit | 1 |
Application Notes
- Line kit included (manufacturer): None
