The Del-a-lum shackle kit rates far superior over polyurethane or stock rubber bushings. The shackle kit actually has the front eyelet bushings included also. The Del-a-lum bushings keep the rear end from moving laterally during hard cornering and under straight-line acceleration. No need for a track bar (panhard rod), in fact a track bar will cause bind in the rear suspension when it is incorporated with Del-a-lum bushings. Del-a-lum bushings can be greased via grease fitting in each of the bushing housings. The recommended grease is synthetic. No other bushing is designed to allow proper lubrication, like the Del-a-lum, insuring a quite ride and longevity. Backed by Global West this bushing comes with a limited life time warranty, and will work with any leaf spring that excepts stock multi-leaf bushings.