Cobb Front Control Arm Inner Bushing Kit (Offset Alignment) - Subaru WRX 2015-2021 / Subaru STI 2011-2021The COBB Front Control Arm Inner Bushing Kit Kit offers a unique metal and polyurethane hybrid design for demanding applications. This provides more precise steering and handling all of the articulation benefits of a vertical pivot solution with greater positive location and durability. WHY? Replace your tired and worn out factory bushings with a high performance option. Reducing compliance within this bushing allows for more predictable behavior.