While the factory rear bump stops do a satisfactory job of absorbing impacts on a street driven truck, ICON found that there was much room for improvement during spirited driving in rough, off-road terrain. The ICON Vehicle Dynamics 2007-2021 Toyota Tundra Rear Hydraulic Bump Stop System was designed to take the off-road capability of the truck to new levels by significantly improving the bottom-out control of the rear suspension and reducing rear end kick. Like all ICON hydraulic bumps stops, these feature both velocity and position sensitive technology which means that as the shaft speed increases and moves through the travel, the force increases exponentially to provide excellent bottoming resistance that wont negatively affect articulation.