RockJock's Antirock Sway Bar Bushing Shim Pack assists in solving the age old problem of inconsistent factory frame widths on all platforms of vehicles that bolt-on Antirock Sway Bar kits are available for. In a lot of cases, if you find your vehicle's frame to be on the narrower side, the Antirock arms can simply be slid on until they are snug against the Antirock bushings and then the arms clamped down. However, in other cases, the arms absolutely have to hold true width to clear bolt heads on the side of the frame, etc. Instances of this nature are where these shims come in! For use in all 28 spline Antirock bar applications, this shim pack includes 4 pieces of CNC machined billet black UHMW shims that install between the outward face of the installed sway bar bushings and the back of the sway bar arms (see photo gallery). Shims are 1/16 in. thick and are able to be stacked to suite your specific vehicle's needs. The UHMW material provides squeak-free operation and long service life.