Wilwood Rear Superlite 4R Internal Parking-Brake Kit, Black Calipers and 14-Inch GT Rotors, Mopar/Dana Snap-Ring Bearing Axles with 2.36-Inch Offset

This rear kit pairs black four-piston Superlite 4R calipers with two-piece 14-inch GT rotors and internal parking-shoe assemblies. It is selected by the Mopar/Dana housing end, 2.36-inch axle offset and non-adjustable snap-ring bearing configuration. Founded by Bill Wood in 1977, Camarillo, California-based Wilwood Engineering designs and manufactures disc brake systems plus their individual components. Its work serves specialized applications, motorsport and street-performance vehicles, with a range of calipers, brake rotors, master cylinders, valves, fittings and brake lines. A compatible complete system governs the selection of each part.

Technical Details

• Manufacturer part number — 140-14878.
• Brake function and supply — Rear Brake Kits - Street Performance; Disc; Parking braking; rear axle; Sold as a kit.
• Rotor construction and friction surface — Spec-37 Iron; Vented; GT Slotted; surface finish: Black Electro Coat.
• Caliper color, finish and hydraulic inlet — Black; Black Powder Coat; inlet 1/8-27 NPT.
• Wheel bolt circle — 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.
• Nominal minimum wheel diameter — 18 in; 457.2 mm; verify full spoke and barrel clearance using the kit drawing.
• Rear flange interface — Mopar/Dana; axle/flange offset 2.36 in; 59.94 mm (distinct from rotor-hat offset).
• Hydraulic package contents — brake lines included: No; master cylinder included: No; booster included: No.
• Rotor dimensions — outside diameter 14.00 in; 355.6 mm; thickness 1.10 in; 27.94 mm.
• Service caliper assembly — Superlite 4R; 4 pistons in each caliper; Stainless pistons; Forged Aluminium body; Radial mounting.
• Supplied pad compound — BP-10.
• Hat wheel-stud clearance diameter — 0.520 in; 13.21 mm.
• Rotor mounting hat — aluminum; Black E-Coat; hat offset 1.540 in.
• Mechanical package contents — no separate hubs included; mounting hardware included: Yes; spindles included: No.
• Parking mechanism — internal parking-brake shoe assemblies included; operating cable/clevis kit 330-9371 purchased separately.

Fitment & Compatibility

DS1256 requires the snap-ring style Green bearing, such as Mopar MO400, Strange A1022 or Moser 9400M. The RP400 style with a pressed-on five-hole retainer is incompatible. Check the axle flange, offset, register, shock clearance and separately supplied hoses and parking-cable connection.

Only snap-ring Green bearings of the specified MO400/A1022/9400M type are suitable. The RP400 pressed-on five-hole retainer type is incompatible. DS1256 warns that shock clearance may require modification or relocation.

PMB Performance has over 20 years of experience with parts and fitment details. Contact us with the original vehicle specification and any changes to its braking or suspension system.

Check the Installation instructions and Technical bulletin for the full assembly and wheel-clearance requirements.

Manufacturer Warning

Applicable to 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.