All Rock Krawler JL systems include correction pads that reduce the spring bow inherent in the factory set up.
The provided track bar geometry corrections, both front and rear, lets you perfectly center the axles so there is no compromise in on road handling.5 inches of lift to clear up to 40 inch tires, depending on model, and improve the on-road ride over the factory linear rate springs.5 Flex System was designed for those who want an easy bolt-in installation, minimal maintenance and the durability and off-road performance you expect from Rock Krawler Suspension.5" Flex System Lift Kit - JL35FS-2 The Rock Krawler JL 3.