Wilwood Rear Black Four-Piston Jeep JK Conversion, 12.88-Inch Slotted Rotors with OE Parking Brake — Selected 2007–2018 Applications

Black Superlite 4R calipers provide four-piston service braking over 12.88-inch slotted rear rotors. This Jeep JK kit retains the matching original parking-brake mechanism and includes its application-specific rear flexlines. Since its founding by Bill Wood in 1977, Wilwood Engineering has focused on disc brake system design and manufacturing. Based in Camarillo, California, it offers calipers, rotors, brake lines, master cylinders, fittings and valves for motorsport, street-performance and specialized installations. Choose components to satisfy the requirements of the entire braking system.

Technical Details

• Manufacturer: Wilwood
• Manufacturer part number: 140-13969
• Kit classification: Rear Brake Kits - Street Performance
• Axle position: Rear Kits
• Brake Type: Disc; Parking
• Selling unit: Sold as a kit.
• Rotor Outside Diameter: 12.88 in; 327.15 mm
• Rotor Thickness: 0.81 in; 20.57 mm
• Rotor Material: Iron
• Surface Type: GT 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
• 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
• 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

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 has over 20 years of brake-parts experience. Send the installed component details if you need help checking this replacement.