The ICON Vehicle Dynamics Lexus GX Rear Coil Spring Conversion Kit consists of billet aluminum bump stop spacers, polyurethane coil spring isolators, and all necessary hardware for installation. The height of the included bump stop spacers has been optimized for use with ICON rear shock absorbers to allow for maximum compression travel and full utilization of ICON shock absorbers bump zones for increased suspension performance. Polyurethane coil spring isolators ensure that the coil is properly retained with minimal deflection and quite operation.