These TeraFlex Outback coil springs receive specific consideration and attention to the spring rate tuning and development to create the best possible springs for Wrangler products. Any type of dedicated overland travel requires only the most specific spring rates, which are suited to heavy loads with continuous mechanical resonance, which react differently than factory produced coil spring rates. TeraFlex engineered load-enhanced, heavy-duty spring rate coils always meet the highest performance demands of any fully loaded Jeep, while maintaining the lift height. Due to the load enhanced spring rate, drivers and passengers experience a firmer ride with an empty payload. The TeraFlex linear coil springs will provide perfectly engineered approaches to the lifted springs for Wrangler models. Extensive rate tuning, combined with dynamic balance between front and rear load bias product coil springs, deliver unsurpassed highway handling, as well as off road performance. TeraFlex chose to use the same tried and true, proven linear rate technology preferred by the Jeep company, resulting in maximum active coils under even the heaviest loads. The shock valving and pairing is consistent through the full range of suspension movement, providing for predictable handling, meeting the requirements for Jeeps equipped for traveling off-road. TeraFlex coil springs are all shot peened, reducing spring fatigue and sag, increasing overall spring life. The springs are powdercoated, providing superior element protection.