Skyjacker Suspension 4 in. Component Box w/ Dual Rate Long Travel Coil Springs - 18-22 Jeep Wrangler

Skyjacker specifically engineered a progressive variable rate coil spring, distinctively a 2-stage dual rate long travel coil. Spring rate progression is from a 1st Flex Rate to a 2nd Ride Rate. The 1st Flex Rate stage delivers a comfortable ride with the ability to flex for increased articulation. The flex rate expands during full articulation as the suspension drops (full droop). This keeps the coil springs seated in the upper coil mount/bucket and the tires in contact with the terrain. The 2nd Ride Rate stage only engages after compression past the flex rate. Engineered to coordinate with the Wrangler's distinctive suspension handling characteristics, the rear coils are side specific. The replacement Front Adjustable Track Bar includes Skyjacker installed pressed-in HD OEM style rubber bushing and an adjustable 3/4- in. Heavy-Duty Rod End, Jam Nut and Alignment Bushings. A heavy duty Rear Track Bar Upper Mount Bracket is included to center the axle under the vehicle properly. Front and Rear Bump Stop Spacers bolt onto the axle bump pads and keep the suspension travel safely in check. Front and Rear Extended Length Sway Bar End Links allow full articulation as the suspension drops (full droop). These sway bar end links include Skyjacker installed pressed-in HD OEM style rubber bushings. Proper suspension geometry ensures the Electronic Stability Control (ESC) system functions within factory parameters.

Additional Information

JL 3.5-4in. 4DR LT

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	skyJL40BKXMLT	Skyjacker 2018 - 2025 Jeep Wrangler Jl Unlimited 4 In Susp Lift Kit W ADX M2.0 Alum Monotube Shocks (1x skyJL3540XM, 1x skyJL40BLT)

• Aggressive Look/Unparalleled Performance/Impressive Ride
• Allows Full Articulation As Suspension Drops [Full Droop]
• Delivers A Comfortable Ride/Flex For Increased Articulation
• Distinctive Improved Suspension Handling Characteristics
• Engineered To Maintain Proper OEM Suspension Geometry
• Extended Length Sway Bar End Links Allow Full Articulation
• Flex Stage\Ride Stage Dual Rate Long Travel Coil Springs
• More Aggressive Off-Road Stance With Comfort And Stability
• Specifically Engineered Progressive Variable Rate Springs
• Straight Bolt-On/Direct Fit/Simple Remove And Replace
• Track Bar Correction Centers Axle Under Vehicle Properly
• Works With OEM Electronic Stability Control [ESC] System

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

4 in. Component Box