Wilwood Rear Black Superlite 4R Conversion, 12.88-Inch Drilled Rotors for 2007–2018 Jeep JK

The drilled-and-slotted version of the 12.88-inch Jeep JK rear kit supplies black Superlite 4R calipers. Rotor hats must register correctly on the factory hub and accommodate the existing parking-brake assembly. Bill Wood established Wilwood Engineering in 1977. Based in Camarillo, California, the company designs and builds disc brake systems for motorsport, street-performance and specialized uses, including calipers, rotors, master cylinders, valves, fittings and brake lines. Each part must match the requirements of the whole braking arrangement.

Technical Details

• Manufacturer: Wilwood
• Manufacturer part number: 140-13969-D
• Kit classification: Rear Brake Kits - Street Performance
• Axle position: Rear Kits
• Brake Type: Disc; Parking
• Selling unit: Sold as a kit.
• Pistons per service caliper: 4
• Service-caliper piston construction: Stainless
• Service-caliper mount: Radial
• Caliper body construction: Forged aluminum
• Caliper Color: Black
• Caliper Finish: Black Powder Coat
• Caliper Inlet Port Diameter: 1/8-27 NPT
• Caliper family: Superlite 4R
• Pad compound: BP-20
• Master Cylinder Included: No
• Brake Booster Included: No
• Brake Lines Included: Yes
• Minimum wheel guidance (clearance drawing required): 17 in; 431.8 mm
• Required rear axle / flange: OEM
• Catalog axle-offset reference: 0.00 in; 0 mm
• Spindle Included: No
• Mounting Hardware Included: Yes
• Separate wheel hubs included: No
• Rotor Outside Diameter: 12.88 in; 327.15 mm
• Rotor Thickness: 0.81 in; 20.57 mm
• Rotor Material: Iron
• Surface Type: SRP Drilled & Slotted
• Rotor construction: Vented
• Bolt Circle Diameter: 5 x 5 in; 5 x 127 mm
• Catalog stud / mounting-hole reference: 0.660 in; 16.76 mm
• Rotor surface finish: Black Electro Coat
• Hat material: Iron
• Hat finish: Black E-Coat
• Hat offset dimension: 2.200 in

Fitment & Compatibility

Confirm the listed Jeep JK rear axle and original parking-brake mechanism; 2018 Wrangler JK fitment does not establish JL compatibility. DS-1080 includes flexlines 220-13968 and their replacement hose-mount brackets. The 12.88-inch rotor/hat must register on the hub and clear the wheel, while the parking shoes are checked and adjusted to the vehicle specification.

Listed models: Wrangler; Wrangler JK. Use the fitment table below for the individual years, submodels and equipment conditions.

Wilwood product specifications · Installation instructions

PMB Performance brings over 20 years of experience to brake-component selection. Provide the actual hardware specification when the brake system has been modified.