ReadyLIFT 8 Inch Big Lift Kit - With SST - Not for use on Trail Boss, AT4, AT4X, ZR2, Diesel or Denali models

44-3985 - 8"F-6.5"R Big Lift Kit - GM Silverado/Sierra 1500 4WD Note: Not for use on Trail Boss, AT4, AT4X, ZR2 or Denali models. Note: Not compatible with Adaptive Ride Control or Multimatic™ suspension. NOTE: This GM 1500 kit is NOT COMPATIBLE with vehicles equipped with rear composite mono-leaf springs. The mono-leaf is easily identifiable – the U-bolt is round/circular around the top of the leaf spring. This kit only works with vehicle equipped with traditional steel leaf springs – identified by ‘square’ U-bolts. The 44-3985 lift kit utilizes the very best in ReadyLIFT engineering with boxed steel front/rear cross members and full width front skid plate constructed of thick 3/16" plate steel. New 1/4-inch boxed plate steel differential drop brackets feature a double gusset and boxed center rib to take the abuse of front differential torsional twisting. Our new "clam-shell" style lower strut extension retains use of the factory struts and does not require strut rotation. These new clam-shell brackets utilizes our TCT lower bushings to provide a precise pivot point that maintains the factory ride. The addition of our proprietary new tubular upper control arms with TCT pivot bushings ensures prolonged upper control arm strength which is far superior to the OE stamped steel control arms. To lift the rear, new 5" tall fabricated steel rear blocks with integrated bump stop landings and an add-a-leaf has been added as well as new Bilstein 5100 series rear shocks.