Whiteline 02-07 Subaru WRX Sedan and Wagon / 03-07 Subaru Impreza Non-Turbo / 04-07 Subaru STi RearYou can never have too much chassis stiffness. Weight aside, the more the better. Chassis bracing maintains alignment angles and spring rates by greatly reducing body or chassis flex. In fact, it helps every component in the suspension system do its job properly and you can feel the difference through improved turn in, sharper steering response along with greater steering feedback. This Part Fits: Year Make Model Submodel 2006 2007 Subaru Impreza 2.