Wilwood Red-Caliper Rear Dynalite Electric Parking Brake Conversion, 12.19-Inch SRP Rotors for Big Ford New-Style 2.50-Inch Axles

Red Dynalite calipers deliver service braking in this rear conversion, while separate red EPB calipers apply the parking hold through an electronic controller. SRP drilled/slotted 12.19-inch rotor assemblies identify this option. It uses the new-style Big Ford housing end with 2.50-inch offset; neither the color nor the vehicle-model row substitutes for checking those dimensions. Flexible hydraulic lines are a separate purchase. Bill Wood founded Wilwood Engineering in 1977; the company is based in Camarillo, California. It designs and manufactures calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications. This kit is one configuration within that disc-brake-system range and must be matched to the vehicle build.

Technical Details

• Manufacturer part number: 140-15843-DR. Quantity: one kit for the stated axle/application.
• Minimum nominal wheel diameter: 15 inches. The wheel must also clear the actual caliper and rotor profile in the installation drawing.
• Rotor specification: 12.19-inch outside diameter × 0.81-inch thickness; SRP drilled & slotted faces. Iron construction; SRP Drilled Rotor & Hat design; published vane configuration: 32 V.
• No replacement wheel hubs are supplied; retain or provide the documented matching hub arrangement.
• 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.
• Separate electronic parking calipers, controller, wiring harness and switch are included. EPB actuation is electrical; hydraulic service braking remains independent.
• Brake hoses are not included. Select suitable braided lines and fittings for the installation.
• Mounting hardware and the specified pads are included. Spindles, master cylinder and brake booster are not supplied.
• Rear housing interface: Big Ford New Style; axle offset: 2.50 in; 63.5 mm.

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.