The Rock Krawler RKR coil springs are specified for Jeep Wrangler JL (gas) installations as part of the Adventure X2 3.5-inch long-arm "No Limits" suspension system with RRD. These springs are a component of a long-arm replacement setup and are intended to work with the Adventure X2 geometry to provide the intended ride and articulation when installed as part of the system described in the product name.
Rock Krawler Jeep Wrangler JL (Gas) 3.5in Adventure X2 "No Limits" Long Arm Suspension System w/ RRD