Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
Red XRS4R calipers and GT slotted discs equip this 2.50-inch-offset Big Ford rear assembly. Its 48-vane Spec-37 rotors are mounted to aluminum parking-brake hats, and the included BP-10 pad set completes the service-brake friction package. Founded by Bill Wood in 1977 and based in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Its components include calipers, brake rotors, master cylinders, valves, fittings and brake lines, selected to suit the complete brake system.
Technical Details
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: GT 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: 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-R
- 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.
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 brings more than 20 years of brake and restoration experience to parts selection. Contact us with the installed spindle or axle details if you need help matching this kit.
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
