2008-2014 Subaru Impreza STI 5DR 2011-2014 Impreza WRX 5DR Duraflex VR-S Rear Diffuser - 1 Piece. This hardware often includes L-brackets, bolts, screws, washers, and other fasteners. L-brackets are commonly used to attach the diffuser securely to the vehicle's chassis or bumper, while bolts and screws ensure a tight fit.