Wilwood Narrow Superlite 4-Piston Rear Big Brake Kit

2007–2018 Jeep Wrangler JK

Part #: 140-13969-DR

Overview

The Wilwood Narrow Superlite 4-Piston Rear Big Brake Kit is engineered specifically for the 2007 to 2018 Jeep Wrangler JK, delivering enhanced stopping power and superior braking performance. Designed for enthusiasts seeking a reliable upgrade for both street and show applications, this kit combines high-performance components to improve braking efficiency while maintaining compatibility with the vehicle’s original equipment features.

This rear brake kit features forged Narrow Superlite 4R calipers finished in a vibrant red powder coat, paired with drilled 12.88-inch rotors that provide excellent heat dissipation and fade resistance. The kit retains full use of the original parking brake, master cylinder output, and ABS system, ensuring seamless integration with the Jeep’s existing braking architecture.

Key Features

Wilwood’s Rear Big Brake Kit offers a blend of style, performance, and reliability, making it an ideal upgrade for Jeep Wrangler JK owners looking to enhance their vehicle’s braking capabilities. Key features include:

• Forged Narrow Superlite 4R four-piston calipers with durable red powder coat finish
• Drilled 12.88-inch rotors for improved cooling and reduced brake fade
• BP-10 compound brake pads optimized for street performance and longevity
• Maintains full functionality of the OEM parking brake system
• Compatible with original master cylinder output and ABS systems
• Designed to complement front big brake upgrades ranging from 13” to 14” rotors
• Requires a minimum 17-inch wheel diameter for proper fitment
• Radial mount caliper design for enhanced rigidity and braking response
• OEM axle offset of 0.00 ensures direct fit without modifications

Construction & Design

The calipers are precision forged from high-strength aluminum alloy, providing an excellent strength-to-weight ratio that reduces unsprung mass for improved suspension response. The Narrow Superlite design optimizes clearance for larger wheels and suspension components, making it ideal for lifted or modified Jeep Wranglers.

The rotors are crafted from premium-grade iron and feature a drilled pattern to facilitate rapid heat dissipation and prevent brake fade during demanding driving conditions. The combination of forged calipers and high-quality rotors ensures consistent braking performance and durability under both daily driving and spirited off-road use.

Installation & Fitment

This rear big brake kit is designed for direct bolt-on installation on 2007–2018 Jeep Wrangler JK models without requiring modifications to the axle or suspension. It retains the factory parking brake system and ABS functionality, allowing for a straightforward upgrade that preserves original vehicle safety features.

Installation requires wheels with a minimum diameter of 17 inches to accommodate the larger rotor size and caliper clearance. Professional installation is recommended to ensure proper brake system bleeding and calibration.

What's Included

• Pair of forged Narrow Superlite 4R four-piston red powder-coated calipers
• Set of drilled 12.88-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 ideal for Jeep Wrangler JK owners who demand improved braking performance for street driving, off-road adventures, and show-quality builds. It complements front big brake upgrades and is well-suited for vehicles with upgraded wheels, tires, and suspension systems seeking balanced braking capability and enhanced style.

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.