FOX Performance Series shocks contain the latest in shock technology to transform the performance of your Truck or SUV. They use our race-proven damping control to provide a comfortable on-road ride and predictable off-road handling in even the toughest conditions.\nApplication specific valving to maximize performance.\n2020-2021 Chevrolet Silverado 2500 HD; 2020-2021 Chevrolet Silverado 3500 HD; 2020-2021 GMC Sierra 2500 HD; 2020-2021 GMC Sierra 3500 HD