Compression Damping Dual Speed (CDXS) valves are included for precisely dialing in your suspension performance. CDXS controls fluid flow under compression, with independent adjustability of high speed and low speed compression force. 10 discreet detented settings for both low and high-speed adjustment knobs allow separate adjustments for handling response and overall aggressiveness. When paired with ICON 3.0 Series Coilovers with CDXS on the front, vehicle control can be precisely dialed in front to rear, resulting in the best overall driving experience. ICON VS 3.0 Series shocks are designed and built to give your vehicle maximum performance off-road and a smooth ride on the street. They feature remote reservoirs and are 100% rebuildable/revalveable. CDCV allows for damping adjustment. TECH NOTE: Compatible with 0-3.5” of rear lift on Tundras equipped with rear OE Load-leveling Rear Height Control Air Suspension