By upgrading the soft stock suspension bushing with a harder unit will take the slop out of your suspension. A harder bushing will not deflect as much during hard use keeping the control in its optimal position. Included with the kit is both the front inner bushings, your control arms will need to be removed from the vehicle to have the old bushings pressed out. The new bushings are 2 pieces, making for easy installation into the control arm. These will transfer more noise and vibration into the cabin so they are not for the faint of heart.