Kit contains everything needed for up to 3" of leveling/lift. Front Leveling/Lift Keys that will provide 2" to 3" of lift with no adverse effects on ride quality, if used reasonably, and not "over-cranked." These Lift Keys provide great lift and ride as good or better than stock. They are indexed differently than stock keys, to provide optimum lift. Then for the rear, 2" all steel blocks, and superior quality, heavy duty U-bolts and hardware. This kit will allow you to run 305/75/16's on 8" wheels. Kit is for 1988 - 1998 K1500 Trucks, Tahoes, Suburbans with torsion bars and rear leaf springs. Kit will NOT work on vehicles with rear coil springs or 2WD models. This kit is for 4WD applications only. Typical install times for this kit, are about 1.5hrs with ease, using a GM torsion bar tool or ball joint tool. Stock shocks WILL work with this kit but combination kits with shocks are also available. Detailed Instructions and as always, Free Technical support should you need us. GET YOURS TODAY!!! *Kit also available for front or rear only or in combination kits including Shocks.