Gurney Flap for 2008-2014 STI Hatchback and 11-14 WRX HatchbackPSP BDY 401BK OVERVIEW Add an aggressive aesthetic and, in some applications, increase downforce with the PERRIN Gurney Flap. AGGRESSIVE AESTHETIC The PERRIN Gurney Flap adds aggressive styling to your trunk spoiler. Without looking too intrusive, the Gurney flap modification adds a small amount of height to your existing spoiler for a clean, clearly modified look. Make sure to check out more install photos at the bottom of the page! CONSTRUCTION The