3.5IN SUPER-FLEX KIT 4D

The Rubicon Express 3.5" Progressive Coil Lift System for Jeep Wrangler JK is an easy-to-install kit designed for off-road performance without requiring driveshaft, exhaust, or brake line modifications. Its progressive coils provide a lower center of gravity for better street handling and increased stability off-road. They offer longer extended lengths than linear coils, maximizing droop travel for full articulation without excessive height. The progressive spring rate ensures a smooth ride over small bumps and prevents harsh bottoming. The kit includes adjustable control arms with Super-Flex spherical ball joints for increased flexibility and was available with or without custom-tuned gas-charged shocks.