Ready LIFT® will lift the front of your new HD truck a maximum of 3-1/2 Inch. This SST Lift Kit for new GM HD trucks includes a pair of tough heavy-duty tubular steel upper Control Arms engineered to match the strength of your truck. Lift Kit also includes CNC-machined differential drop spacers which lowers the differential and puts the front CV axles into safe factory angle on 4WD trucks. To lift the rear of your new Chevy Silverado 2500HD truck, the Ready LIFT SST Lift Kit includes OEM style 1.0 Inch cast iron rear lift blocks complete with new U-bolts and hardware. A Tow Package version of this kit is also available with a taller 2.0 Inch rear lift block. This kit includes SST3000 Shocks.