Fox's Factory Race Series shocks are for those who demand the ultimate in suspension performance from their Ford F-150. With massive 2.5-inch diameter bodies, they house big valving pistons for maximum damping force. Those plus-size bodies and remote reservoirs team up to keep the Factory Race Series shocks cool and fade-free no matter how hard you run them. The shocks come with compression and rebound valving specific to the F-150 for maximum control and comfort in any terrain. Fox's unique Dual Speed Controllers (DSC) allow for even more fine-tuning of high- and low-speed compression. The ability of your Ford F-150 to absorb bumps and rough terrain will be radically transformed with Fox's Factory Race Series shocks.