Torque Solution Billet Rear Differential Brace (Black)Torque Solution Billet Aluminum Rear Differential Brace Applications: Subaru WRX STI 08+ Torque Solution Billet Aluminum Rear Differential Brace is a must have for your high horsepower or big turbo Subaru. Our billet piece is stronger than the OEM cast brace and includes 75A Durometer Urethane bushings to ensure there is no differential movement. Less drivetrain movement means more power to ground. This will benefit all types of racers whether you are