APEXi EXV Rear Lower Camber Kit (Rubber) - Nissan 350Z (Z33) / Infiniti G35EXV Rear Camber Kit (rubber) Hardened Rubber Bushing Equipped Components: Suspension arms equipped with rubber bushings are intended for use on applications where an increased adjustment range is desired while preserving as much comfort as possible. The hardened rubber bushing components minimizes deflection under load better preserving alignment settings, isolation from noise, vibration, and harshness increasing its life span over its stock