After many changes through the years on the WRX and STI there are now two types of Vortex Generators available to the 15-18 WRX/STI crowd. Here are the difference between the two so you can select the correct model for your car.
If your antenna measures front to back approximately, 8 1/2" inches, you can use this vortex generator.
This vortex generator fits all 2017 WRX models with 7 inch Starlink Radios (wit. . . Show More >