Includes New Tubular Upper Control Arms GM SST Lift Kit - Max Lift: 4.0"F/3.0"R - Max Tire Dia: 33" For use with Factory ALUMINUM Knuckle Suspension or Stamped Steel Front Suspension. Not for use on cast steel suspension. Not for use on AWD vehicles. Fits 2015-2020 Tahoe, Suburban, Yukon & Escalade NOTE: Will not work with rear airbag suspension. Solid Mount and even load distribution Press in 10.9 grade Hardware 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