Wilwood Narrow Superlite 4-Piston Rear Big Brake Kit

Jeep Wrangler 07-15 3.8L/3.6L

Part #: 140-13969

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 improved brake performance. Designed for enthusiasts seeking a reliable upgrade that maintains the original equipment (OE) parking brake functionality, this kit combines high-performance components with a sleek black powder-coated finish for a clean, aggressive look. Ideal for street, off-road, and show applications, it complements front big brake upgrades and supports larger wheels and tires without compromising safety or brake feel.

This rear brake kit is perfect for Jeep Wrangler JK owners who demand superior braking capability while retaining full compatibility with the vehicle’s ABS system and master cylinder output. It offers a balanced upgrade that enhances both style and function, making it a smart choice for performance-minded drivers.

Key Features

The Wilwood Narrow Superlite 4-Piston Rear Big Brake Kit combines advanced engineering with durable materials to provide reliable and consistent braking performance. Key features include:

• Forged Narrow Superlite 4R four-piston calipers with black powder coat finish for corrosion resistance and aesthetic appeal
• Slotted 12.88-inch diameter rotors designed to improve heat dissipation and reduce brake fade under demanding conditions
• BP-10 compound brake pads optimized for street and light performance use, offering excellent bite and modulation
• Maintains full use of the OE parking brake system, ensuring convenience and safety without modification
• Compatible with ABS and master cylinder output for seamless integration with factory brake systems
• Designed to complement front big brake upgrades ranging from 13 to 14 inches in diameter
• Requires a minimum 17-inch wheel diameter for proper clearance and fitment
• OEM axle offset of 0.00 and radial mount caliper design for precise alignment and ease of installation

Construction & Design

The calipers are 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 caliper size to fit behind a wide range of aftermarket wheels while delivering four-piston clamping force for consistent braking power. The rotors feature a slotted pattern that enhances pad bite and helps evacuate gases and debris, extending pad life and maintaining performance during repeated heavy braking.

Each component is finished with a durable black powder coat that resists corrosion and wear, ensuring long-lasting appearance and performance even in harsh environments. The kit’s engineering preserves the factory parking brake mechanism, eliminating the need for additional adapters or modifications.

Installation & Fitment

This rear big brake kit is designed as a direct bolt-on upgrade for the 2007–2018 Jeep Wrangler JK, requiring no custom fabrication or modification to the axle or suspension components. The radial mount calipers align precisely with the OEM axle offset, simplifying installation and ensuring reliable operation. Installation typically involves removing the factory rear brake components and replacing them with the Wilwood kit parts, while retaining the original parking brake cables and hardware.

Due to the larger rotor diameter, a minimum 17-inch wheel diameter is required to provide adequate clearance. This kit is ideal for Jeep owners who have upgraded their front brakes or wheels and tires and want a balanced rear braking solution.

What's Included

• Forged Narrow Superlite 4R four-piston rear calipers with black powder coat finish
• Slotted 12.88-inch diameter rotors
• BP-10 compound brake pads pre-installed in calipers
• Mounting hardware and brackets compatible with OE parking brake system
• Installation instructions

Ideal For

This Wilwood rear big brake kit is ideal for Jeep Wrangler JK owners who:

• Require enhanced rear braking performance for street, off-road, or light track use
• Have upgraded front brakes and want a balanced braking system
• Seek to maintain full OE parking brake functionality and ABS compatibility
• Are upgrading to larger wheels and tires and need improved brake clearance and performance
• Value a durable, corrosion-resistant finish with a clean black caliper appearance

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.