Wilwood Rear Brake System with Red Forged Dynalite Calipers, 12.19-Inch Plain Rotors and EPB, Big Ford New-Style Housing Ends

The plain-rotor red Dynalite package converts a dimensionally compatible rear axle to four-piston service brakes and electric parking calipers. Its 12.19 × 0.81-inch vented rotor assemblies work with BP-10 pads; the supplied harness and controller operate the separate parking circuit. Mounting requires the Big Ford new-style flange and a verified 2.50-inch axle offset, plus space for the electric motors and their wiring. Based in Camarillo, California, Wilwood Engineering was founded by Bill Wood in 1977. Its disc brake systems serve motorsport, street-performance and specialized applications. The range includes calipers, rotors, master cylinders, valves, fittings and brake lines, with each component chosen for its role in the complete brake installation.

Technical Details

• Manufacturer part number: 140-15843-R. Quantity: one kit for the stated axle/application.
• Brake hoses are not included. Select suitable braided lines and fittings for the installation.
• Separate electronic parking calipers, controller, wiring harness and switch are included. EPB actuation is electrical; hydraulic service braking remains independent.
• Service caliper: Forged Dynalite Internal; 4 pistons; stainless piston material. Lug mounting, red powder coat finish.
• Published piston bores: 1.38, 1.38 inches. Supplied pad compound: BP-10.
• Caliper hydraulic inlet: 1/8-27 NPT.
• Rotor specification: 12.19-inch outside diameter × 0.81-inch thickness; plain faces. Iron construction; Ultralite HP 32 & Hat design; published vane configuration: 32 V.
• No replacement wheel hubs are supplied; retain or provide the documented matching hub arrangement.
• Rear housing interface: Big Ford New Style; axle offset: 2.50 in; 63.5 mm.
• Mounting hardware and the specified pads are included. Spindles, master cylinder and brake booster are not supplied.
• Minimum nominal wheel diameter: 15 inches. The wheel must also clear the actual caliper and rotor profile in the installation drawing.

Fitment & Compatibility

Application is controlled by the Big Ford new-style housing flange and a measured 2.50-inch axle offset. The application table lists a 1990 Lincoln Town Car, but the manufacturer does not currently confirm that model application. Do not order for a Town Car by year/model alone; verify the housing-end drawing, bearing retainer and offset first. Check axle-flange diameter, wheel seating, wheel profile and EPB motor clearance through suspension travel. The electronic parking system is for stationary parking hold, not an emergency stop brake. Mounting brackets must allow both service and parking calipers to clear the body and suspension. Use the complete application table below for the individual year, submodel, brake configuration and note attached to each entry.

With over 20 years of parts and fitment experience, PMB Performance can help compare the required mounting interface with the vehicle build. Share spindle or axle measurements and wheel information before ordering if anything is uncertain.

Manufacturer documentation: Installation instructions; Technical bulletin.

Manufacturer Warning

Applicable to brake pads only: Wilwood warns of exposure to arsenic, cadmium, hexavalent chromium compounds, lead, nickel, cobalt and antimony trioxide, chemicals known to California to cause cancer or reproductive harm. More information: P65Warnings.ca.gov.