Synergy JK Track Bar Dual Durometer Bushing - 1.875X.188 Inch W/12mm Bolt Fits: Replacement Bushing For 8155-01, 8156 Details: Synergy Dual Durometer Bushing (DDB) Series Feature a maintenance free, grease less design Self centering with 30 degrees of misalignment (4320-01, 4320-02, 4320-03) Outer inchsoft inch durometer acts as bushing cushion and flex material Inner inchhard inch durometer lining acts as the bearing surface to allow free floating inner sleeve to rotate. Provides for a maintenance free inchzero bind inch bushing Internal bushing ring separates inner and outer materials to prevent inner sleeve gaping at extreme flex Direct replacement available for aftermarket control arms using OEM Clevite style lower control arm bushings Bushings available for all suspension components made by Synergy MFG as well as many other companies Bushings are sold complete with inner sleeve installed Sold Individually