Cobb Tuning Alloy Front Lower Control Arm Pair Caster Increase - Subaru WRX/STI 15-21The COBB Subaru Alloy Front Lower Control Arm, Offset Caster (or STD Alignment) will increase the handling of your WRX to better than that of the STI. This is accomplished with by using light weight alloy construction which yields less unsprung weight. Stiffer bushings also provide better tire contact patch control with minimal NVH and maximum service life. The difference between this unit and the standard caster LCA is the offset provided by the rear