Skyjacker Suspension JL40BLT Lift Kit Component Box for Jeep Wrangler JL - 4 4-Door

The Skyjacker JL40BLT is a comprehensive 4-inch lift component box specifically engineered for Jeep Wrangler JL 4-door models without Rubicon suspension. This complete system is designed to work without shocks, allowing you to pair it with your preferred dampers.

Progressive Variable Rate Coil Springs:

At the heart of this system are Skyjacker's innovative 2-stage dual rate long travel coil springs. The 1st Flex Rate stage delivers exceptional ride comfort while providing increased articulation capability. During full droop, the flex rate expands to keep coil springs properly seated in the upper mount buckets and maintain tire contact with terrain. The 2nd Ride Rate stage engages only after compression past the flex rate, providing progressive load handling. The rear coils are side-specific to coordinate with the Wrangler's distinctive suspension characteristics.

Complete Component Package Includes:

• Front adjustable track bar with pre-installed heavy-duty OEM-style rubber bushings and adjustable 3/4-inch heavy-duty rod end with jam nut and alignment bushings
• Heavy-duty rear track bar upper mount bracket to properly center the axle under the vehicle
• Front and rear bump stop spacers that bolt onto axle bump pads to safely control suspension travel
• Front and rear extended length sway bar end links with pre-installed HD OEM-style rubber bushings for full articulation during droop

This system maintains proper suspension geometry to ensure the Electronic Stability Control (ESC) system functions within factory parameters, preserving vehicle safety systems while delivering enhanced off-road capability.