Tuff Country’s 4 in. Suspension Lift Kit for the 2007-2018 Silverado 1500 reintroduces their upper control arm design kits! These lift kits are very affordable and simple to install. Using new tubular upper control arms along with upper coil/strut spacers, differential drops and a replacement differential skid plate (2007-2013 4wd models only) to lift the front of the vehicle 4 inches and cast iron blocks with extended ubolts lift the rear 2 inches.