Kicker braces add rigidity to the front crossmember assembly and are highly recommended for aggressive off road use.Easy bolt-on installation Increases off-road stability Adds rigidity to the front crossmember assemblyOnly fits Rough Country Ford 4in - 6in suspension lift kits2-3 hourshttps://s3.amazonaws.com/roughcountry/install/921557BOX6.pdf2015-2020:4WD:Ford:F-150