aFe's RaceRunner front leveling coil springs raise the front of your JL approximately 2" from factory ride height for improved ground clearance over rough terrain, overall vehicle control and offers a level ride height. These RaceRunner coil springs perform with factory or RaceRunner series shocks. Front Leveling Springs: 2" Front Leveling Coil Springs Improve Handling and Offer More Ground Clearance Over Rough Terrain. Cold Formed Chrome Silicone Mat erials: Precision Designed and Manufactured Form Quality Materials For Durability and Longevity. Easy Installation: Factory Designed Configuration. No Modifications Required.