Upgrade those oil shocks to heavy duty gas shocks (where applicable)Ready to mount out of the boxRugged design comes standard with 10% stiffer springsAdjustable preloadReplacement eyelet bushings availableALL BRONCO SHOCKS AND STRUTS INCLUDE SPRINGS, RETAINERS, AND BUMPERS (WHERE APPLICABLE)IMPORTANT! All suspension nuts and bolts are very important parts that could affect the performance of the shock. All components must be tightened to the OEM specified torque and should be periodically checked and tightened if needed.