Skyjacker Dual Rate LT Coil Spring Comp Box

2021–2024 Jeep Wrangler 2.0L Turbo / 2023 Jeep Wrangler 6.4L 392

Part #: JL37ERBLT

Overview

The Skyjacker Dual Rate LT Coil Spring Comp Box is a precision-engineered suspension upgrade designed specifically for the 2021–2024 Jeep Wrangler with 2.0L Turbo engines and the 2023 Wrangler 6.4L 392. This advanced coil spring system features a progressive variable rate design that enhances ride comfort, articulation, and off-road capability. Ideal for Jeep enthusiasts seeking a balanced lift of 3.75 inches, it improves suspension travel and maintains optimal tire contact with the terrain for superior traction and control.

Skyjacker’s innovative two-stage dual rate coil springs provide a smooth ride during normal driving conditions while delivering increased flex and articulation when tackling challenging off-road obstacles. This system is engineered to work harmoniously with the Wrangler’s unique suspension geometry, ensuring stability and performance without compromising factory electronic stability control functions.

Key Features

Designed for durability and performance, the Skyjacker Dual Rate LT Coil Spring Comp Box offers a comprehensive suspension upgrade package with the following key features:

• Progressive two-stage dual rate coil springs with a 1st Flex Rate for comfort and articulation, and a 2nd Ride Rate for compression control
• Side-specific rear coil springs engineered to match Wrangler’s suspension characteristics
• Front Adjustable Track Bar with heavy-duty OEM-style rubber bushings and a 3/4-inch adjustable rod end for precise alignment
• Heavy-duty Rear Track Bar Upper Mount Bracket to properly center the axle under the vehicle
• Front and Rear Bump Stop Spacers to safely limit suspension travel and prevent damage
• Extended Length Front and Rear Sway Bar End Links with pressed-in heavy-duty rubber bushings for full suspension articulation
• Maintains proper suspension geometry to ensure Electronic Stability Control (ESC) functions within factory parameters
• 3.75-inch lift height optimized for both on-road comfort and off-road capability

Construction & Design

Skyjacker’s Dual Rate LT Coil Springs are crafted from high-quality steel with a progressive variable rate design that adapts to different driving conditions. The two-stage coil spring system starts with a softer flex rate to absorb bumps and allow articulation, then transitions to a firmer ride rate to control compression and maintain vehicle stability. Rear coils are side-specific to accommodate the Wrangler’s suspension geometry, ensuring balanced handling and ride quality.

The included track bars and sway bar end links feature heavy-duty pressed-in OEM-style rubber bushings for durability and noise reduction. The adjustable front track bar allows for precise alignment adjustments, while the reinforced rear track bar mount bracket ensures the axle remains centered under the vehicle, preserving proper suspension geometry throughout the lift range.

Installation & Fitment

This coil spring and suspension component kit is designed for direct fitment on 2021–2024 Jeep Wrangler models equipped with the 2.0L Turbo engine and the 2023 Wrangler 6.4L 392. Installation requires basic suspension knowledge and standard tools. The kit includes all necessary components to achieve a 3.75-inch lift without the need for additional modifications. Proper installation maintains factory Electronic Stability Control (ESC) functionality and ensures safe, reliable operation on and off-road.

What's Included

• Dual rate progressive variable rate coil springs (front and side-specific rear)
• Front Adjustable Track Bar with HD OEM-style rubber bushings and adjustable rod end
• Heavy-duty Rear Track Bar Upper Mount Bracket
• Front and Rear Bump Stop Spacers
• Extended Length Front and Rear Sway Bar End Links with pressed-in HD rubber bushings

Ideal For

This Skyjacker Dual Rate LT Coil Spring Comp Box is perfect for Jeep Wrangler owners who want to enhance their vehicle’s off-road performance without sacrificing daily driving comfort. It suits enthusiasts looking for improved suspension articulation, increased ground clearance, and better tire contact on rough terrain. Whether tackling trails, rock crawling, or upgrading for a more aggressive stance, this kit delivers a balanced lift with durable components engineered specifically for the latest Wrangler models.

Skyjacker is a long-running off-road suspension brand offering lift kits, shocks, steering stabilizers, and related components for trucks, SUVs, and Jeeps. Built to increase clearance for larger tires and improve trail capability, Skyjacker systems are popular for enthusiasts who want a tougher stance and more off-road confidence with proven application coverage.