Wilwood Red Superlite Rear Service and Electric Parking Brake System, 14-Inch GT Rotors, New-Style Big Ford Flange

Red Superlite 4R calipers and 14-inch GT slotted Spec-37 rotors define this rear service-brake package. A second set of motor-operated calipers provides parking hold from the included electrical controls, without a cable-operated parking mechanism. The axle needs the documented new-style Big Ford flange and 2.50-inch offset. Hydraulic hose routing and full-travel motor clearance are separate installation checks. From Camarillo, California, Wilwood Engineering develops disc-brake systems for street-performance, motorsport and specialized uses. Bill Wood founded the company in 1977. Calipers, brake rotors, master cylinders, valves, fittings and brake lines form part of its range, and must be combined to match the demands of the complete brake system.

Technical Details

• Manufacturer part number: 140-15845-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 Narrow Superlite 4R; 4 pistons; stainless piston material. Radial mounting, red powder coat finish.
• Published piston bores: 1.12, 1.12 inches. Supplied pad compound: BP-10.
• Caliper hydraulic inlet: 1/8-27 NPT.
• Rotor specification: 14.00-inch outside diameter × 1.10-inch thickness; GT slotted faces. Spec-37 Iron construction; GT 72 Curved Vane design; published vane configuration: 72 CV.
• Rotor hats: aluminum, black e-coat finish; Big Brake Hat - Flared Bell. Hat offset: 2.035 inch.
• No replacement wheel hubs are supplied; retain or provide the documented matching hub arrangement.
• Wheel mounting patterns: 5 x 4.50; 5 x 4.75; 5 x 5.00 inches.
• 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: 18 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.

Use PMB Performance’s 20+ years of parts and fitment experience when checking a modified brake layout. The installed mounting hardware and measured wheel space are more useful than model and year alone.

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.