Perrin Wing Gurney Flap Black 2009-2014 WRX Hatchback / 2008-2014 STI Hatchback

The Gurney Flap is a small tab projecting from the trailing edge of a wing. Typically it is set at a right angle to the pressure side surface of the airfoil, and projects 1% to 2% of the wing chord. This trailing edge device can improve the performance of a simple airfoil to nearly the same level as a complex high-performance design. The PERRIN Gurney Flap is mounted to the rear wing by drilling holes and bolting on. Other gurney flaps mount with double-sided tape and advertise an equally strong attachment. The PERRIN Gurney Flap will be secured much better with its bolts than a wing with tape for much greater peace of mind. With other PERRIN Gurney Flaps, they have been tested to see what sort of performance increase can be found. Stay tuned for tests performed on the PERRIN Gurney Flap for 2009-14 WRX & 2008-14 STI!