Wilwood Superlite 4R Rear Big Brake Kit

2007–2018 Jeep Wrangler JK

Part #: 140-14066-R

Overview

The Wilwood Narrow Superlite 4-Piston Rear Big Brake Kit is a precision-engineered upgrade designed specifically for the 2007–2018 Jeep Wrangler JK. This kit delivers enhanced stopping power and improved brake performance, making it an excellent choice for Jeep enthusiasts who demand reliable, fade-resistant braking without sacrificing factory features.

Ideal for those who have upgraded their front brakes or suspension, this rear big brake kit provides balanced braking performance while maintaining full compatibility with the original equipment (OE) parking brake and ABS systems. The combination of forged four-piston calipers and slotted 14-inch rotors ensures consistent fade resistance and superior heat dissipation, whether on the street, trail, or towing heavy loads.

Key Features

Wilwood’s Narrow Superlite 4R Rear Big Brake Kit combines advanced engineering with durable materials to deliver exceptional braking performance and reliability. Key features include:

• Forged Narrow Superlite 4R four-piston calipers with a vibrant red powder coat finish for corrosion resistance and enhanced visual appeal
• Slotted 14-inch rotors designed to improve cooling, reduce brake fade, and channel away gases and debris for consistent braking
• BP-10 compound brake pads optimized for street performance, offering excellent initial bite and low dust generation
• Maintains full use of the OE parking brake system for safety and convenience
• Compatible with factory ABS systems to preserve all original safety features
• Radial mount calipers engineered for OEM axle offset, ensuring precise fitment and improved braking leverage
• Requires a minimum 18-inch wheel diameter to accommodate the larger 14-inch rotors and calipers
• Complements front brake upgrades of 13 inches or larger for balanced and effective braking performance

Construction & Design

The calipers are forged from high-strength aluminum alloy, providing an excellent strength-to-weight ratio that reduces unsprung mass while maintaining rigidity under heavy braking loads. The Narrow Superlite design optimizes clearance for a wide variety of wheel styles and sizes, making it a versatile upgrade for Jeep Wrangler JK owners.

Rotors are precision-machined from premium cast iron and feature slotted surfaces that enhance pad bite and help dissipate heat and debris. This design improves overall braking consistency and extends rotor life. Wilwood’s powder-coated calipers resist corrosion and maintain a fresh, vibrant appearance even in harsh off-road environments.

Installation & Fitment

This rear big brake kit is designed for direct bolt-on installation on 2007–2018 Jeep Wrangler JK models, requiring no modifications to the master cylinder or parking brake cables. The radial mount calipers align precisely with the OEM axle offset, ensuring proper rotor and pad engagement for reliable braking performance.

Installation involves removing the factory rear brake components and replacing them with the Wilwood kit, making it a straightforward upgrade for experienced DIYers or professional installers. Note that a minimum 18-inch wheel diameter is required to clear the larger 14-inch rotors and calipers, so verifying wheel compatibility before installation is essential.

What's Included

• Forged Narrow Superlite 4R four-piston rear calipers with red powder coat finish
• Slotted 14-inch rotors
• BP-10 compound brake pads pre-installed in calipers
• Mounting hardware and brackets for direct fitment
• Installation instructions

Ideal For

This Wilwood rear big brake kit is perfect for Jeep Wrangler JK owners who have upgraded their front brakes or suspension components and want a matching rear brake system that enhances overall stopping power and vehicle control. It is well suited for street performance, light off-road use, towing, and show vehicles where both style and function are important. Enthusiasts seeking reliable, fade-resistant braking without sacrificing factory parking brake or ABS functionality will find this kit an excellent choice.

Wilwood Engineering is a major manufacturer of high-performance disc brake solutions spanning racing, street performance, and specialty OE applications. From big brake kits and calipers to rotors and hydraulic components, Wilwood upgrades are built for stronger stopping power, better heat management, and consistent pedal feel when stock brakes aren’t enough.