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Product details
Drilled-and-slotted SRP rotor faces distinguish this black Dynapro rear kit from the plain-rotor configuration. The enclosed mechanical parking brake acts independently of the four-piston hydraulic calipers. Bill Wood’s 1977 founding of Wilwood Engineering began a disc brake design and manufacturing business based in Camarillo, California. The range includes master cylinders, calipers, rotors, brake lines, valves and fittings for motorsport, street-performance and specialized vehicles. Component selection must consider the complete braking arrangement.
Technical Details
- Manufacturer part number: 140-13181-D
- Application and package: Rear Brake Kits - Street Performance; Rear Kits; Disc; Parking; Sold as a kit.
- Rotor dimensions: 12.19 in; 309.63 mm outside diameter; 0.81 in; 20.57 mm thickness
- Rotor construction: Iron; Vented; SRP Drilled & Slotted
- Caliper assembly: Dynapro Lug Mount; 4 pistons per caliper; Forged Aluminium body; Lug mount
- Piston and finish specification: Stainless pistons; Black calipers; Black Powder Coat
- Hydraulic inlet: 1/8-27 NPT
- Wheel bolt pattern(s): 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-hole / clearance provision: 0.52 in; 13.21 mm; diameter provision, not a thread designation
- Wheel diameter starting requirement: 15 in; 381 mm; verify the individual wheel against the installation drawing
- Rear axle-end interface: Big Ford New Style; axle/flange offset 2.50 in; 63.5 mm
- Included mechanical components: Mounting hardware: Yes; hub(s): No; spindle(s): No
- Hydraulic components supplied: Master cylinder: No; brake booster: No; brake lines: No
- Specified pad compound: BP-10
Fitment & Compatibility
Compare the supplied axle flange with the New Style Ford pattern before using the 1990 Town Car listing. The 2.50-inch offset and rotor-centering dimensions must match; confirm cable routing and the wheel template. The application table includes a 1990 Lincoln Town Car row, but Wilwood identifies this kit by axle flange and offset. Stock Town Car axle compatibility is not established; confirm the actual or custom axle measurements before purchase.
A maximum flange diameter of 6.61 inches and a 0.050-inch x 45-degree chamfer are specified for rotor clearance. The illustrated register is 2.80 inches; select the documented centering arrangement and match both axle offset and housing-end bolt pattern.
Inspect shock-to-brake clearance as well as the axle dimensions; the installation instructions note that some shock arrangements may need modification or relocation.
Hydraulic hoses/fittings and parking-brake cables, adapters and cable hardware are not included. Choose a compatible cable arrangement for the internal parking brake; universal cable systems may require vehicle or cable modifications.
Kit may fit some 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
Manufacturer References
Our team at PMB Performance has over 20 years of parts and fitment experience. The existing component number and brake-system details help us check the match.
Review the complete application table below with the year, submodel and installation qualifications above.
| Years | Make | Model | Model option | Front brakes | Rear brakes | Kit application | Notes |
|---|---|---|---|---|---|---|---|
| 1990 | Lincoln | Town Car | All | Disc | Drum | Rear Kit | 1, 2 |
