Cusco Power Brace Rear End 2015 Subaru Impreza USDM Model (VA Chassis Cusco Lower Side Floor Bar Power Braces Rear (Steel) Bracing for Cusco Rear Lateral Link Power Braces 2022+ WRX FastWRX.com Cusco Front Member Power Brace 2015+ Subaru WRX STI Cusco Power Brace Rear Trunk Plus Subaru WRX STI 15+ Cusco Chassis Body Power Brace Rear (Steel) Bracing for Subaru. 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.