Skyjacker Rear Dual Rate Long Travel Coil Spring Set

2021–2024 Jeep Wrangler 6.4L 392

Part #: JLUR303RDR

Overview

The Skyjacker 3-inch Rear Dual Rate Long Travel Coil Spring Set is engineered specifically for the 2021–2024 Jeep Wrangler equipped with the 6.4L 392 engine. Designed for off-road enthusiasts who demand superior suspension performance without sacrificing on-road comfort, these coil springs deliver a balanced ride quality. They provide enhanced articulation and stability during aggressive off-road maneuvers while maintaining smooth, controlled handling on paved roads.

Skyjacker’s precision engineering ensures that these springs meet the unique suspension characteristics of the Jeep Wrangler, offering a progressive dual-rate design that adapts to varying terrain and driving conditions. This coil spring set is ideal for Jeep owners seeking improved suspension travel and durability for both trail and street use.

Key Features

Skyjacker’s rear coil springs incorporate advanced technology and thoughtful design to optimize performance and longevity:

• 3-inch lift height for increased ground clearance and suspension travel
• Dual rate progressive coil design with two distinct spring rates for comfort and control
• First Flex Rate stage allows coil expansion during full suspension droop to maintain tire contact
• Second Ride Rate stage engages under compression for firm support during heavy loads or rough terrain
• Side-specific springs engineered to match the Wrangler’s rear suspension geometry
• Constructed from high-strength 5160H chromium alloy steel for superior durability
• Shot peened surface treatment to increase tensile strength and fatigue resistance
• Preset solid height to eliminate sagging and maintain consistent ride height
• Durable powder coat finish provides corrosion resistance for long-lasting protection
• Tested through rigorous cycle testing to ensure quality and reliability

Construction & Design

These coil springs are manufactured from premium 5160H chromium alloy steel, known for its excellent strength and resilience under demanding conditions. The springs undergo a specialized shot peening process where high-velocity steel pellets compress the surface, enhancing tensile strength and resistance to fatigue. This treatment ensures the springs maintain their shape and performance over extended use.

Additionally, each spring is preset to its solid height, meaning the coils are compressed fully during manufacturing to relieve internal stresses. This presetting process prevents sagging and extends the lifespan of the springs. The final powder coat finish adds a robust protective layer against rust and corrosion, making these springs suitable for harsh off-road environments and all-weather conditions.

Installation & Fitment

The Skyjacker rear coil spring set is designed as a direct fit for the 2021–2024 Jeep Wrangler 6.4L 392, requiring no modifications for installation. These side-specific springs replace the factory rear coils and work seamlessly with the Wrangler’s existing suspension components. Installation can be completed by experienced DIYers or professional technicians using standard suspension tools. Proper installation ensures optimal suspension travel, ride quality, and vehicle handling.

What’s Included

• One pair of Skyjacker 3-inch rear dual rate long travel coil springs
• Installation instructions

Ideal For

This coil spring set is perfect for Jeep Wrangler 6.4L 392 owners who want to enhance their vehicle’s off-road capability without compromising daily driving comfort. It suits enthusiasts who frequently tackle rugged trails, rock crawling, or uneven terrain and require improved suspension articulation and tire contact. Additionally, it benefits those looking to maintain a smooth, controlled ride on highways and city streets while enjoying the benefits of a lifted suspension.

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.