Introducing the ReadyLIFT SST Lift Kit system for 2007-2016 1500-series Silverado/Sierra 6-lug 2WD Trucks now with ultra-strong TCT free-floating pivot bushings for friction-free operation. This innovative 4.0" lift kit is entirely bolt-on a result of over six months of rigorous product development and testing. It offers increased ground clearance accommodating tire sizes up to 33" on aftermarket wheels such as 33x11.50 on 22x9.5 wheels with 5.5" backspacing or 17x9 wheels with +0 offset on a 285/70R17. The system raises the front of your Silverado/Sierra 1500 2WD trucks by 4.0" using robust powder-coated steel strut extensions which don't require any irreversible modifications to the factory strut. Additionally it includes 100% DOM tubular upper control arms with OEM-style ball joints providing clearance and maintaining OEM geometry without spindle modifications. To lift the rear the kit incorporates 3.0" OEM-style cast iron rear lift blocks and U-bolts featuring pinion angle correction and axle locating ears for a perfect fit and performance. The rear shock extensions maintain the factory mounting position for a great ride with your existing shocks. This system is backed by a Limited Lifetime Warranty from ReadyLIFT. Please note that the kit is designed for use with aftermarket wheels with a backspacing of 5.25". If you plan to use stock wheels with larger aftermarket tires you'll need a wheel spacer to prevent tire contact with the control arm at full locked turn. ReadyLIFT offers a CNC-machined billet aluminum wheel spacer (10-3485) for factory wheels with stud pockets. Ensure compatibility with your vehicle as some 2016 models with stamped steel Control Arms or Aluminum upper Control Arms are not suitable for this lift kit. Finally this kit is not intended for off-roading purposes.