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Product details
Red four-piston calipers and 12.19-inch drilled/slotted rotors form this Wilwood front conversion for the listed Jeep configurations. The matching hub/spindle arrangement is essential: 1990–2006 YJ and TJ applications need 1987–1989 YJ spindles and hubs. The rotor hat is selected for that interface rather than for any later hub fitted to a vehicle bearing the same model name. 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-DR
- Type: Forged Narrow Superlite 4R Big Brake Front Brake Kit (Hat)
- Calipers: Forged Narrow Superlite 4R; 4 pistons per caliper; Red 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
Verify the application-specific hardware with DS922, including the hub geometry and required dust-shield modification. Confirm the early-YJ conversion before choosing a later YJ/TJ row. The 16-inch screening figure requires a separate spoke and barrel check with the actual wheel. Select hydraulic hoses for steering lock, suspension travel and any lift, then verify the completed front/rear brake balance before the system is used.
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.
| Years | Make | Model | Model option | Front brakes | Rear brakes | Kit application | Notes |
|---|---|---|---|---|---|---|---|
| 1984-1985 | Jeep | Cherokee | All | Disc | Drum | Front Kit | 1, 2, 3 |
| 1984-1985 | Jeep | Wagoneer | All | Disc | Drum | Front Kit | 1, 2, 3 |
| 1986-1989 | Jeep | Cherokee | 4 X 4 Only | Disc | Drum | Front Kit | 1, 2, 3 |
| 1986-1989 | Jeep | Comanche | 4 X 4 Only | Disc | Drum | Front Kit | 1, 2, 3 |
| 1986-1989 | Jeep | Wagoneer | 4 X 4 Only | Disc | Drum | Front Kit | 1, 2, 3 |
| 1987-1989 | Jeep | Wrangler | All | Disc | Drum | Front Kit | 1, 2, 3 |
| 1990-1995, 1997-2006 | Jeep | Wrangler | Req. conversion to 87-89 YJ front spindles | Disc | Drum | Front Kit | 1, 2, 3 |
| 1997-2006 | Jeep | TJ Series | Req. conversion to 87-89 YJ front spindles | Disc | Drum | Front Kit | 1, 2, 3 |