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Product details
Black XRS4R calipers clamp 12.88-inch drilled/slotted rotors in this Big Ford rear conversion. The rotor hats house mechanical parking shoes; their cables and attachment hardware are selected separately to suit the vehicle's lever and routing. Bill Wood established Wilwood Engineering in 1977. From 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
Kit contents and separate parts
- Manufacturer part number: 140-18293-D
- 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
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.
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)
Calipers and pads
- Calipers: XRS4R; 4 pistons
- Caliper finish: Black 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
Installation documents
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.
PMB Performance has supported brake and restoration projects for more than 20 years. Share your vehicle and installed chassis hardware with us for help selecting the correct brake package.
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
