The ICON Raptor Bump Stop System includes heavy duty steel clamshell brackets, a billet aluminum frame crossmember, adjustable tension rods, hydraulic bump stops, and all of the necessary hardware required to complete the installation. The clamshell brackets, crossmember, and tension rods add strength to the frame to prevent damage during extreme off-road use while increasing chassis rigidity for predictable handling and improved vehicle dynamics. The 2.5* travel hydraulic bump?stops feature velocity sensitive technology which means that as the shaft speed increases the damping ability ramps up, resulting in exponential bottoming resistance that won*t negatively affect articulation. Combining all of these components into an easy to install, bolt-on package, ICON has developed the most comprehensive rear bump stop solution on the market for Raptor owners seeking the next level of strength and performance. 2017-2020 FORD RAPTOR REAR AIR BUMP KIT