Tanabe TUB140F Sustec Rear Underbrace for 2008-2008 Subaru Impreza WRX STI The internal construction of the brace features a double I-beam construction which help these braces achieve their high rigidity Ultra lightweight ovalshaft Specifically engineered to connect to points on the chasis that would provide the highest rigidity and flex reduction Braces are available in 2 or 4 point configurations, depending on application