Fox 2.0 Performance Coil-Over Front Pair 2014-2016 Ford F150 4WD Front Pair of Coil-overs - Fits 4WD Vehicles Coil-over lift height is achieved by adjustable preload ring from factory height up to 2" of lift. Spanner wrench for adjustment not included. Monotube gas charged with 2-inch aluminum seemless alloy body. Shocks are rebuildable and nitrogen gas-rechargeable. All necessary washers, bushings, and nuts included. Factory shock mounting bolts are reused for installation. Fox's limited one (1) year warranty protects against defects and premature failure.