Torque Solution Rear Trailing Arms | 2015 - 2021 Subaru WRX / STI (TS-SU-784-VA)2015 2021 Subaru WRX STI Rear Trailing Arms by Torque Solution Torque Solution Adjustable Rear Trailing Arms are a perfect complement to go along with our camber arms and toe links. These add additional stability and response by reducing deflection caused by the OEM rubber bushings in the factory trailing arms. These work great for street and track use and do not transmit harsh vibration thru the vehicle. Features 6061 T6 Billet Aluminum Black