The TeraFlex JK: 2.5in Performance Spacer Lift Kit is the most economical way to fit larger tires and increase ground clearance with the least amount of modifications. Don�t let its affordability fool you; this 2.5in Performance Spacer Lift Kit includes the innovative TeraFlex spring retention spacer that prevents the spring from dropping out during extreme articulation. Every TeraFlex suspension system is engineered with drivability and performance in mind. Properly developed suspension geometry, roll center, and load tuning ensures that all factory stability controls remain functional and within the parameters that Jeep originally engineered into the vehicle. Not only do TeraFlex kits drive straight, but they will crawl over anything to get you there and back! 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. 2.5in Performance Spacer Lift Kits are offered with TeraFlex 9550 VSS Twin-Tube Shocks, with shock extensions, or without shock absorbers or extensions. Falcon Performance Shocks are available separately.