ICON Vehicle Dynamics V.S. Series 2.5ö coilover shocks are an incredible upgrade for the front end of 2021-2023 Ford F-150 Tremor and F-150 4WD trucks equipped with ICON's Front Knuckle Kit. These coilovers feature an application specific length for F-150 Tremor or other F-150 sub-models equipped with ICONÆs Front Knuckle Kit, allowing the most wheel travel possible as well as a taller lift height range than other ICON coilover options.