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Product details
Black FNSL4R calipers and 12.88-inch GT slotted rotors form this rear disc and internal parking-brake package for the specified Mopar/Dana snap-ring bearing arrangement. The bearing-retainer design is central to compatibility, so the 2.36-inch axle offset and correct Green bearing must both be confirmed. Founded by Bill Wood in 1977 and based in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Its component range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines. Select individual components to meet the requirements of the complete brake system.
Technical Details
Rotors and mounting dimensions
- Rotors: 12.88 in; 327.15 mm diameter x 1.10 in; 27.94 mm thick; vented Spec-37 Iron
- Friction faces: GT Slotted
- Rotor finish: Black Electro Coat
- Internal vanes: 48 curved
- Hats: aluminum; Black E-Coat; 1.540-inch hat offset
- Rotor/hat wheel-stud clearance patterns: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm
- Hat wheel-stud clearance holes: 0.520 / 0.520 / 0.520 in, corresponding to the listed hat patterns
Calipers and friction components
- Calipers: Forged Narrow Superlite 4R; 4 pistons per caliper
- Caliper finish: Black Powder Coat
- Body construction: Forged aluminum
- Piston material: stainless
- Caliper mounting: radial
- Hydraulic inlet: 1/8-27 NPT
- Included pad compound: BP-10
- Listed piston bore sizes: 1.38 / 1.38 in
Kit contents and separate parts
- Manufacturer part number: 140-9222
- Supply: one kit with brake components for both sides of the rear axle
- Mounting hardware: included
- Hubs: not included
- Spindles, master cylinder and brake booster: not included
- Hydraulic hoses: not included
- Required axle housing end: Mopar/Dana
- Axle offset: 2.36 in; 59.94 mm
- Internal drum parking-brake assemblies and bearing retainers are included; axle shafts and bearings are not supplied.
Fitment & Compatibility
Match the Mopar 8-3/4 or Dana 60 housing end and 2.36-inch axle offset before ordering. This version requires non-adjustable snap-ring Green bearings: Mopar MO400, Strange A1022 or Moser 9400M. The RP400 bearing with a pressed-on five-hole retainer is not compatible. Verify bearing diameter, flange pattern, axle register and shock clearance against DS-532; relocation of shocks may be necessary. The maximum axle flange is 6.61 inches with the specified chamfer. Hydraulic hoses, fittings and parking cables are separate; the universal 330-9371 cable kit requires application-specific installation. Nominal minimum wheel diameter: 17 in; 431.8 mm. Compare the actual wheel barrel and spokes with the linked clearance drawing; diameter alone does not establish fit.
Installation documents
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.
PMB Performance brings more than 20 years of brake and restoration experience to parts selection. Contact us with the installed spindle or axle details for help matching this kit.
