Wilwood Black Superlite Rear Brake Conversion, 14-Inch Drilled/Slotted Rotors for Listed Jeep Wrangler JL Applications (Listed 2018–2025 Applications)

The black/SRP rear option for Wrangler JL uses four-piston radial Superlite calipers and drilled/slotted 14.00-inch rotor rings. Its hats work with the documented original parking-brake arrangement, while the hydraulic service brakes receive BP-20 pads and dedicated flexlines. Do not extend this rear kit's application to the Gladiator simply because the related front family covers both vehicles. Check the listed Wrangler configuration directly. Wilwood Engineering was established in 1977 by Bill Wood in Camarillo, California. The company designs and manufactures disc-brake systems and components, from calipers and rotors to master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized installations. Each component must match the rest of the brake system.

Technical Details

• Manufacturer part number: 140-15930-D. Quantity: one kit for the stated axle/application.
• Included braided flexline kit: 220-15929 (25.00 in). Confirm the chassis fitting and routing for the actual installation.
• Uses the documented original parking-brake mechanism; this is not an electronic-parking conversion kit.
• Service caliper: Forged Narrow Superlite 4R; 4 pistons; stainless piston material. Radial mounting, black powder coat finish.
• Published piston bores: 1.38, 1.38 inches. Supplied pad compound: BP-20.
• Caliper hydraulic inlet: 1/8-27 NPT.
• Rotor specification: 14.00-inch outside diameter × 0.81-inch thickness; SRP drilled & slotted faces. Iron construction; SRP Drilled Rotor design; published vane configuration: 36 V.
• Rotor hats: iron, black e-coat finish; Parking Brake Hat - Standard. Hat offset: 2.200 inch.
• No replacement wheel hubs are supplied; retain or provide the documented matching hub arrangement.
• Wheel mounting pattern: 5 x 5.00 inches.
• Rear housing interface: OEM; axle offset: 0.00 in; 0 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

This rear kit is for the Wrangler JL entries in the table; it is not a Gladiator rear kit. Exact trim ranges differ, including the listed 4xe and special-edition applications. It retains the documented original parking-brake mechanism, master-cylinder output and ABS operation where fitted. Check the existing parking brake and hub arrangement, rear brake balance, flexline routing and 18-inch wheel clearance before installation. Use the complete application table below for the individual year, submodel, brake configuration and note attached to each entry.

PMB Performance has over 20 years of experience working with parts and fitment details. Provide the actual brake hardware, mounting dimensions and wheel measurements when requesting help with this conversion.

Manufacturer documentation: Installation instructions.

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.