Cusco Power Brace Subaru Impreza WRX STi Sedan (2011 2014) Center Fr Cusco Power Brace Rear Member Side 08 21 WRX STI New Provisions Racing Cusco Lower Member Power Brace Rear (Steel) Bracing for Subaru WRX Cusco Bracing for Subaru WRX VA TOP END Motorsports Cusco Front Member Power Brace 2015+ Subaru WRX STI. Developed by chassis engineers based off the data logged directly from CUSCO motorsports research. The power brace strengthens chassis and minimizes body flex especially at cornering loads, enabling optimal suspension movement at the intended geometrically aligned state. Having the same effect as stitch welding a chassis, the Power Brace series are Bolt on design with some minor body piece (under cover interior etc) trimming and completely effective on all vehicle chassis no matter stock or highly modified. These bars are made and constructed by lightweight steel and engineered inside & out by using the state of the art chassis stress test simulation software by leading motorsports professionals.