Universal Gurney Flap are the perfect addition to any GT spoiler like Voltex, APR, J's Racing, or OEM spoiler such as the ones on the 2017+ Civic Type R, Mitsubishi EVO and Subaru WRX STi. This 3 dimensional rubber piece is 2 meters in length and is pre-applied with 3M double sided tape for easy installation.
A Gurney Flap (or wickerbill) is a small flat tab projecting from the trailing edge of a wing. Typically, it's set at a right angle to the pressure side surface of the airfoil, and projects 1 to 2 percent of the wing chord. The device operates by increasing pressure on the pressure side while decreasing pressure on the suction side, and helping the boundary layer flow stay attached all the way to the trailing edge on the suction side of the airfoil. This type trailing edge device can improve the performance of a simple airfoil to nearly the same level as a complex high-performance design.