Dial in ride height on your Jeep Wrangler TJ or LJ with JKS ACOS adjustable rear coil spring spacers. The range of ride height adjustment is from 1-1/2″ to 3-3/4″ — without taking apart suspension components. ACOS adjustable coil spring spacers compensate for uneven load distribution and spring settling. They can save you from having to replace coil springs as you add equipment weight. The high-tech, billet design looks great, too. Dura-Thane isolators prevent noise transfer.