2011-UP GM 3500 HD 3.5" Tubular Arm SST Lift Kit. Max Lift: 3.5"F-2.0"R Max Tire: 34" NOTE: Single Rear Wheel with Tow Package Springs or Dual Rear Wheels ONLY.  NOT FOR USE ON VEHICLES EQUIPPED WITH TOP MOUNTED OVERLOAD leaf springs. Includes SST3000 Shocks Includes 2.0" Rear Lift Block for towing applications 2011-UP GM HD 3.5" Tubular Arm SST Lift Kit w/o shocks.. Forged Torsion Keys w shock extensions Will not deform or change shape No Cutting of OEM Parts or Welding Maintains Factory Ride If it needs it‚¬¦ Its in the box.