These Pro Comp Pro Runner SS shocks are designed to deliver the perfect ride and off-road style that you're looking for. Pro Comps Pro Runner SS shocks are engineered for late model trucks and SUVs with coil-over, strut-style, independent front suspensions. The SS shocks unique design features Pro Comps patent-pending, 180 degree, SS height-adjustable collar. The collar allows you the option of raising the front of your vehicle up to 2.5 in. for larger tires, or keeping your rig at the factory ride height. Whether your towing a trailer or blazin' the trails, you can rely on Pro Comps Pro Runner SS shocks. Kit fits: 2007+ Toyota Tundra 2WD or 4WD models. All Trim packages work including Rock Warrior, SR5, Base or Limited Models. Note: Kit without rear lift does not raise the rear of the vehicle. The rear shocks do not add lift. Note: Front Adjustable Pro Runner SS Shocks use factory coil springs and upper coil spring mount.