Superlift Long Arm Kit with Fox RES Shocks

2018–2023 Jeep Wrangler Unlimited (JLU)

Part #: K199FX

Overview

The Superlift 4-inch Long Arm Kit with Fox RES Shocks is engineered specifically for the Jeep Wrangler Unlimited JLU models from 2018 through 2023. Designed by true off-road enthusiasts, this suspension upgrade delivers enhanced articulation, improved ride quality, and superior handling both on and off the pavement. Whether you’re tackling rugged trails or cruising city streets, this kit provides a balanced lift that maintains factory-like drivability while offering the clearance and durability needed for serious off-roading.

Superlift’s commitment to quality and customer satisfaction ensures that this long arm kit not only meets but exceeds expectations. The integration of premium Fox RES shocks adds advanced damping technology, giving you precise control over suspension movement and improved comfort over rough terrain.

Key Features

This long arm kit combines robust construction with high-performance components to deliver a reliable and versatile suspension upgrade:

• 4-inch suspension lift designed to improve ground clearance and suspension travel
• Includes Fox Racing Shox RES (Reservoir) shocks for superior damping and heat dissipation
• Heavy-duty long arms engineered for strength and durability under extreme off-road conditions
• Precision-engineered bushings and hardware to reduce noise and improve ride quality
• Maintains proper suspension geometry for improved handling and tire wear
• Compatible with factory and aftermarket wheels and tires up to a larger size
• Designed for easy integration with existing Jeep Wrangler Unlimited components
• Tested extensively to ensure on-road comfort and off-road capability

Construction & Design

Superlift’s long arm kit is crafted from high-strength steel, providing exceptional rigidity and resistance to bending or fatigue. The arms are powder-coated for corrosion resistance and long-lasting durability in harsh environments. The Fox RES shocks feature a remote reservoir design that improves shock cooling and performance during extended off-road use, reducing fade and maintaining consistent damping characteristics.

Every component is engineered with precision to maintain factory suspension geometry, ensuring that your Jeep handles predictably and safely after installation. The kit’s design balances rugged off-road capability with everyday drivability, making it an ideal upgrade for Jeep enthusiasts who demand versatility.

Installation & Fitment

The Superlift 4-inch Long Arm Kit with Fox RES Shocks is a direct-fit suspension upgrade for 2018–2023 Jeep Wrangler Unlimited (JLU) models. Installation requires moderate mechanical skills and common hand tools. While the kit is designed for bolt-on installation, professional installation is recommended to ensure proper alignment and optimal performance.

No major modifications to the vehicle’s frame or drivetrain are necessary, preserving factory reliability and warranty considerations. After installation, a professional alignment is essential to maintain proper handling and tire wear.

What's Included

• Front and rear long arms with bushings and mounting hardware
• Fox RES remote reservoir shocks (front and rear)
• All necessary brackets and hardware for installation
• Detailed installation instructions

Ideal For

This long arm kit is ideal for Jeep Wrangler Unlimited owners seeking a balanced suspension lift that enhances off-road capability without sacrificing on-road comfort. It suits enthusiasts who enjoy trail riding, rock crawling, and overlanding, as well as those who want a rugged, aggressive stance with improved suspension articulation. The integration of Fox RES shocks makes it especially appealing to drivers who demand superior shock performance and durability under demanding conditions.