When it comes to the Jeep Wrangler, these TeraFlex linear coil springs provide a perfectly engineered approach to lifted springs. Coil springs with unsurpassed highway handling and off-road performance is guaranteed due to extensive rate tuning and dynamic balance between front and rear load bias. TeraFlex has chosen to use proven linear rate technology that has been the preference of many vehicle manufacturers including Jeep. Doing so results in ideal Jeep off-road travel with maximum active coils under load, shock valving and pairing that is consistent through the full range of suspension movement, and predictable handling. TeraFlex coil springs are shot peened to reduce spring sag and fatigue, and increase coil spring life. TeraFlex coil springs are powdercoated for superior element protection. All TeraFlex coil springs come with a limited lifetime warranty against defects.