Wilwood SRP Front Disc Conversion, Black, Jeep Cherokee/Wagoneer/Comanche/Wrangler/TJ Series (1984–2006), YJ Hub Arrangement

Drilled/slotted 12.19-inch rotors and black Superlite 4R calipers distinguish this Wilwood front package for the specified Jeep spindle/hub layout. The separate hats retain the correct original hub arrangement. Vehicle applications extend beyond the 1987–1989 Wrangler only under their individual conditions, with 1990–2006 YJ/TJ installations requiring conversion to the early YJ spindle and hub assembly. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings, and brake lines for motorsport, street-performance, and specialized applications.

Technical Details

• Manufacturer part number: 140-12576-D
• Type: Forged Narrow Superlite 4R Big Brake Front Brake Kit (Hat)
• Calipers: Forged Narrow Superlite 4R; 4 pistons per caliper; Black Powder Coat.
• Caliper bore sizes: 1.75, 1.75 inches. Piston type: Stainless.
• Included pad compound: BP-10.
• Rotors: 12.19-inch diameter × 1.10-inch thickness; SRP Drilled & Slotted; Iron; Black Electro Coat surface; 32 vanes.
• Wheel bolt circles: 5 X 4.50 inches.
• Included: paired calipers, pads, rotors, mounting brackets and assembly hardware, rotor hats.
• Hydraulic lines and fittings selected separately. No master cylinder, booster or spindles are supplied.
• Conditional wheel screening size: 16 inches. Use the installation clearance diagram to verify the actual barrel and spoke profile.

Fitment & Compatibility

Use DS922 to compare the actual hub, stud pattern and spindle before ordering. Later hubs are excluded unless the required early-YJ conversion is performed. The installation includes dust-shield modification, so inspect that area before disassembly. Hydraulic hoses are separate and must suit steering and suspension travel. Confirm rotor seating and the whole caliper envelope inside the wheel rather than relying solely on the 16-inch screening diameter.

Match the individual model, year, submodel and brake configuration in the fitment table below.

Wilwood installation documents: Installation instructions.

PMB Performance has over 20 years of brake-system experience. Contact us with your vehicle details and installed brake hardware for help confirming the correct arrangement.

California Proposition 65 warning, brake pads only: WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.