The factory location of the upper shocks on your GM 2500HD/3500 limits the amount of down travel of your front suspension. This can be fixed with the simple installation of the Kryptonite Shock Extension Kit. This kit allows you to extend your factory length shocks to allow your suspension to achieve the full amount of down travel available.
NOTE: Will NOT fit on 2024+ AT4X & ZR2 trucks equipped with DSSV shocks.