The TeraFlex JK 4dr: 4in Coil Spring Lift Kit w/ Track Bar includes just the basic lift components only and doesn�t have the drivability of a full suspension system. Requires longer preset or adjustable control arms to correct suspension geometry. An adjustable rear track bar is recommended. Does NOT include shocks. We recommend Falcon Performance Shocks or TeraFlex 9550 VSS Twin-Tube Shocks. These are the only shock absorbers engineered to work with TeraFlex lift coil springs to improve both compression and rebound for optimal vehicle stability