ReadyLift 3.5''F / 2"R SST Lift Kit 2011-2019 GM Silverado / Sierra 3500HD SRW-Tow & DRW2011 UP GM 3500HD 3. 5" Tubular Arm SST Lift Kit. Max Lift: 3. 5"F 2. 0"R Max Tire: 34" NOTE: Single Rear Wheel with OEM Tow Package Rear Springs or Dual Rear Wheels ONLY. Requires the use of longer front shocks. Shocks not included with kit. Forged Torsion Keys OEM Style Cast Blocks Will not deform or change shape No Cutting of OEM Parts or Welding Maintains Factory Ride If it needs it Its in the box ReadyLIFT Suspension is excited to offer 2011 2019