The SPC Navistar HD Shim is designed for the lateral link on Navistar "Corporate" 6x4 air suspensions to help center the axle with the frame rails and adjust thrust angle and toe by placing the shim between the spring hanger and the spring. Sold six shims per box, these parts provide alignment correction specific to the Navistar 6x4 configuration.
SPC Performance NAVISTAR HD SHIM 1/16(6)