Wilwood Superlite 4R Rear Big Brake Kit

Jeep Wrangler 07-15 3.8L/3.6L

Part #: 140-14066

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 enhances rear braking performance by delivering increased stopping power and improved brake modulation, making it ideal for both spirited street driving and demanding off-road conditions. It is designed to work seamlessly with front big brake upgrades, ensuring balanced braking performance while retaining the factory parking brake functionality and ABS compatibility.

Featuring forged Narrow Superlite 4R calipers finished in sleek black powder coat and paired with slotted 14-inch rotors, this kit not only boosts braking efficiency but also adds a custom, aggressive look to your Wrangler’s rear end. It is perfect for Jeep enthusiasts who have upgraded or plan to upgrade wheels, tires, and suspension components and require a rear brake system that matches in performance and style.

Key Features

This rear big brake kit incorporates advanced design elements and high-quality materials to deliver superior braking performance and durability:

• Forged Narrow Superlite 4R four-piston calipers for enhanced clamping force and even brake pad wear
• Black powder-coated calipers providing corrosion resistance and a refined appearance
• Slotted 14-inch rotors designed to improve heat dissipation and reduce brake fade under heavy use
• BP-10 compound brake pads optimized for street performance and long-lasting durability
• Maintains full functionality of the original equipment parking brake system
• Compatible with factory master cylinder output and ABS systems for safe, reliable operation
• Calipers feature OEM axle offset with radial mount configuration for precise fitment
• Requires minimum 18-inch wheel diameter to accommodate the larger 14-inch rotors
• Complements front big brake upgrades to ensure balanced braking performance across all four wheels

Construction & Design

The Wilwood Superlite 4R rear brake kit is built with forged aluminum calipers that provide exceptional strength while minimizing unsprung weight, contributing to improved suspension response and vehicle handling. The calipers’ narrow profile enhances clearance for aftermarket wheels and suspension components, making this kit an excellent choice for modified Jeep Wranglers.

The rotors are crafted from premium-grade iron and feature precision-machined slots that facilitate superior cooling and efficient debris removal during intense braking scenarios. This design helps prevent brake fade and maintains consistent stopping power. The black powder coat finish on the calipers not only adds a sleek, aggressive look but also protects against corrosion and wear, ensuring long-term durability.

Installation & Fitment

This kit is designed for direct bolt-on installation on 2007–2018 Jeep Wrangler JK models equipped with OEM rear axles. It retains the factory parking brake mechanism and requires no modifications to the master cylinder or ABS system, simplifying the upgrade process. Installation typically requires standard hand tools and moderate mechanical experience.

To ensure proper fitment, the vehicle must be equipped with 18-inch or larger wheels to accommodate the 14-inch rotors. This kit is engineered to work in harmony with existing front big brake upgrades, providing a balanced and effective braking system.

What's Included

• Forged Narrow Superlite 4R black powder-coated 4-piston rear calipers
• Slotted 14-inch rotors
• BP-10 compound brake pads pre-installed
• Mounting hardware and brackets designed for OEM axle offset
• Detailed installation instructions

Ideal For

This rear big brake kit is ideal for Jeep Wrangler JK owners who have upgraded or plan to upgrade their front brakes, wheels, tires, or suspension components and require a matching rear brake system. It suits enthusiasts seeking improved braking performance for spirited street driving, off-road adventures, or show-quality builds that demand both function and style. Whether you’re enhancing your Wrangler for trail duty or daily driving, this kit delivers reliable, high-performance rear braking capability.

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.