Cobb Front Control Arm Inner Bushing Kit (STD Alignment) - Subaru WRX 2015-2021 / Subaru STi 2011-2021The COBB Front Control Arm Inner Bushing replaces the front control arm rear vertically mounted bushing and features low compliance synthetic elastomer with high performance low compliance bearings for optimum dynamic alignment. WHY? Replace your tired and worn out factory bushings with a high performance option. Reducing compliance within this bushing allows for more predictable behavior. FEATURES COBB Front Control Arm Inner Bushing Kit STD