PU Bushings Performance polyurethane Sway Bar & End link sets make your vehicle’s sway bar system much more effective. In effect, it’s almost like buying an upscale/higher performance anti-sway bar! Your sway bar system never had it so good! Replaces that original, short lived, and “too-soft” rubber. Dollar-for-dollar they offer the greatest improvement in performance handling. Greaseable bushings feature zerk type fittings, allowing for periodic greasing. Channels allow for the lube to migrate to where it is needed.