Wilwood Superlite 4R Rear Big Brake Kit

2007–2018 Jeep Wrangler JK

Part #: 140-14066-D

Overview

The Wilwood Narrow Superlite 4-Piston Rear Big Brake Kit is a high-performance upgrade designed specifically for the 2007–2018 Jeep Wrangler JK. This rear brake kit enhances stopping power and brake modulation, delivering confident braking performance on both street and off-road terrains. Engineered to complement front big brake upgrades, it ensures balanced braking while maintaining full compatibility with the original equipment parking brake, master cylinder output, and ABS systems.

Featuring sleek black powder-coated calipers paired with drilled 14-inch rotors, this kit not only improves braking efficiency but also adds an aggressive, refined look to your Jeep. It is an ideal solution for Jeep enthusiasts who want to upgrade their rear brakes without sacrificing factory safety features or requiring extensive modifications.

Key Features

This rear big brake kit incorporates advanced engineering and premium components to provide superior braking performance and durability:

• Forged Narrow Superlite 4R four-piston calipers with black powder coat finish for corrosion resistance and a stylish appearance
• Drilled 14-inch rotors designed to enhance heat dissipation and reduce brake fade under demanding conditions
• BP-10 compound brake pads optimized for street and light performance use, offering excellent initial bite and fade resistance
• Maintains full original equipment parking brake functionality for safety and convenience
• Compatible with OE master cylinder output and ABS systems for seamless integration
• Designed for OEM rear axle with zero offset, ensuring precise fitment and alignment
• Supports minimum 18-inch wheel diameter to accommodate larger rotor size and aftermarket wheels
• Ideal for pairing with 13-inch or larger front brake upgrades to achieve balanced braking performance

Construction & Design

The calipers are forged from high-strength aluminum alloy, delivering an excellent strength-to-weight ratio that reduces unsprung mass while maintaining rigidity under heavy braking loads. The Narrow Superlite design optimizes clearance for larger wheels and suspension components without compromising caliper size or piston count.

The rotors are crafted from premium-grade cast iron and feature a drilled pattern to improve cooling efficiency and minimize brake fade during extended or aggressive use. The black powder coat finish on the calipers provides long-lasting corrosion protection and complements the rugged styling of the Jeep Wrangler JK.

Installation & Fitment

This kit is engineered for direct bolt-on installation on 2007–2018 Jeep Wrangler JK models, requiring no modifications to the original parking brake system or ABS components. The radial mount calipers align precisely with the OEM rear axle, allowing for straightforward installation using factory mounting points.

To accommodate the 14-inch rotors, a minimum wheel diameter of 18 inches is required. Installation is suitable for experienced DIY enthusiasts or professional installers familiar with brake system upgrades.

What's Included

• Pair of forged Narrow Superlite 4R four-piston black powder-coated calipers
• Pair of drilled 14-inch rotors
• BP-10 compound brake pads pre-installed in calipers
• Mounting hardware and brackets compatible with OEM parking brake
• Installation instructions

Ideal For

This Wilwood rear big brake kit is perfect for Jeep Wrangler JK owners who have upgraded their front brakes or are running larger wheels and tires that demand enhanced rear braking performance. It suits enthusiasts seeking reliable stopping power for spirited street driving, off-road adventures, or show-quality builds that benefit from a clean, aggressive brake appearance without compromising factory safety features.