Set of 4 Shocks - compatible with 2WD & 4WD Vehicles 4-6" Front Lift and 4-6" Rear Lift Shock boots & Roost Shields sold separately. 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 Shocks The 2.0 Performance Series IFP smooth body shocks contain the latest in shock technology to transform the performance of your Truck or SUV. They use race-proven damping control to provide a comfortable on-road ride and predictable offroad handling in even the toughest conditions. The precision metal impact aluminum body increases cooling capacity and will never rust. Inside you will find our race-proven performance valving technology Our Internal Floating Piston (IFP) mono-tube design separates the shock oil from the high-pressure, nitrogen-charged gas chamber. The IFP eliminates oil aeration allowing maximum performance from the factory-tuned precision valving. The race developed high flow damping piston matched with application specific vavling provides the 2.0 Performance Series IFP shock a predicable ride quality capable of handling the roughest road conditions.