The Rancho RS66114B-1 is box one of a three-box 4-inch short-arm lift solution for 2007–2017 Jeep Wrangler JK applications. It provides increased ground clearance and wheel travel through front and rear progressive-rate coil springs and adjustable control arms tuned for on- and off-road comfort. Box one contains major suspension components and works with boxes two and three to complete the full RS66114B master kit.
Rancho 07-17 Jeep Wrangler Fr and R Short Arm Suspension System Component - Box One