Skunk2 542-05-1110 Alpha Series Gold Anodized Rear Lower Control Arm Accurate suspension geometry is maintained under the most aggressive driving conditions using high load steel spherical bearings on the trailing arm side and tuned durometer elastomeric bushings for the sub frame side of the LCA Delrin bushings are utilized at the shock mounting position for their low friction and minimal deflection for unparalleled dynamic shock control Using this specific combination of bushings allows the most comfort and control under any driving conditions Forged 6061-t6 billet aluminum, 15% lighter than previous skunk2 LCA's, 40% lighter than OEM arms 7% stronger than previous skunk LCA's, tuned durometer elastomeric bushings to damp out harshness, Delrin shock bushings for low friction w/minimal deflection for dynamic shock control