I have a rough country level 2WD GMC Sierra and a 3/3 spindle and rear wheel block kit - bought these 1.5" washers to align the rear wheels - torqued to 105 ft/lbs - had to Don't cut the bolts as the wheels were already countersunk and the wheels were torqued to 125 ft/lbs on the spacers the alignment was done and everything was buttery smooth - in the near future hub rings will be fitted to all 4 wheels.