The ultra-simple TeraFlex JLU 4-Door: 2. 5” Coil Spring Base Lift Kit comes with the basic parts needed to fit larger tires for increased ground clearance for better off-road capability without compromising on road handling. Does NOT include shocks. We recommend Falcon Performance Shocks or TeraFlex 9550 VSS shocks or shock extensions. These are the only shock absorbers engineered to work with TeraFlex lift coil springs to improve both compression and rebound for optimal vehicle stability. 2. 5” Coil Spring Base Lift Kits are offered with TeraFlex 9550 VSS Twin-Tube Shocks or with shock extensions or without shock absorbers. Falcon Performance Shocks are available separately.