SuperPro 2008 Subaru Impreza WRX STI Front Lower Inner Control Arm Bushing - Anti-Lift/Caster KitTRC3095 includes not only an upgraded bushing assembly for the rear of the front lower control arm replacing the soft and heavily voided factory item it is a geometry optimized kit adding anti lift spacers and hardware as well as an offset bushing design for additional positive caster. Together the anti lift geometry and positive caster deliver a significant increase in cornering grip, steering feel and weight, initial turn in and traction. This Part