Superlift Dual Rate Coil Springs

2018–2019 Jeep JL Unlimited Rubicon (Front)

Part #: 588

Overview

The Superlift Dual Rate Coil Springs provide a reliable 4-inch front lift specifically engineered for the Jeep JL Unlimited Rubicon models from 2018 to 2019. Designed by off-road enthusiasts for off-road enthusiasts, these coil springs enhance your Jeep’s suspension performance by improving ground clearance and articulation without compromising on-road drivability. Whether you’re tackling rugged trails or cruising city streets, these springs deliver a balanced ride quality and superior handling.

Superlift has been a trusted name in suspension systems since 1975, combining decades of experience with a passion for trucks and off-road vehicles. The Dual Rate Coil Springs are crafted to meet the demands of Jeep owners who want dependable lift and improved suspension geometry while maintaining comfort and control during everyday driving.

Key Features

Superlift’s Dual Rate Coil Springs offer a range of benefits tailored to Jeep JL Unlimited Rubicon owners seeking a 4-inch front lift:

• Precisely engineered dual-rate design for progressive spring rates, enhancing ride comfort and load handling
• 4-inch front lift height to improve ground clearance and accommodate larger tires
• Optimized for both on-road stability and off-road articulation
• Durable powder-coated finish for corrosion resistance and long-lasting appearance
• Designed to work seamlessly with factory suspension components and other Superlift lift kit parts
• Manufactured by a company with over 45 years of off-road suspension expertise
• Tested to ensure consistent performance under demanding conditions

Construction & Design

These coil springs are constructed from high-quality steel alloys, engineered to provide strength and durability while maintaining flexibility. The dual-rate design means the springs have two distinct spring rates: a softer initial rate for comfort over small bumps and a firmer secondary rate to support heavier loads and prevent bottoming out during aggressive off-road maneuvers. This engineering approach ensures a smooth ride on pavement without sacrificing off-road capability.

Each spring is precision wound and heat-treated to maintain its shape and performance over time. The protective powder coat finish guards against rust and environmental damage, ensuring your investment lasts through years of use in various weather and terrain conditions.

Installation & Fitment

Installation of the Superlift Dual Rate Coil Springs is straightforward for experienced mechanics and professional installers familiar with Jeep JL Unlimited Rubicon suspension systems. These springs are designed to directly replace the factory front coil springs, requiring no cutting or permanent modifications. For optimal results, it is recommended to pair these springs with compatible Superlift components and to have a professional alignment performed after installation.

While installation complexity is moderate, Superlift’s knowledgeable technical support team is available to assist with any questions or guidance needed during the process.

What's Included

• Set of front dual rate coil springs providing 4-inch lift
• Installation instructions
• Technical support access from Superlift experts

Ideal For

This product is ideal for Jeep JL Unlimited Rubicon owners from 2018 to 2019 who want to enhance their vehicle’s off-road capability with a moderate 4-inch front lift. It suits enthusiasts who require improved ground clearance for larger tires and better suspension articulation without sacrificing daily drivability and ride comfort. Whether you’re a weekend trail rider or an outdoor adventurer, these springs offer a dependable upgrade that balances performance and reliability.