The Outback Coil Spring by TeraFlex receive special attention and consideration concerning spring rate development and tuning. Any type of overland travel requires specific spring rates, which are suited to heavier loads and continuous mechanical resonance, reacting differently than factory coil spring rates. The TeraFlex engineered load-enhanced, heavy-duty spring coils meet every performance demand of a Jeep while maintaining lift height. The load enhanced spring rate provides a firmer ride with an empty payload. TeraFlex linear coil springs serve the perfectly engineered approach to the lifted springs for Wrangler models. An extensive dynamic balance and rate tuning between rear and front load bias produces coil springs delivering unsurpassed highway handling, as well as off road performance. TeraFlex uses the same tried and true linear rate technology preferred by Jeep, resulting in maximum active coils under even the heaviest loads, with shock valving and pairing, consistent through all range of suspension movement. The predictabel handling meets the requirements for Jeep equipped off-road travel. TeraFlex coil springs are shot peend to avoid fatigue and sag, increasing overall life. TeraFlex coil springs are also powdercoated for superior elemental protection.