These rear fender flares are perfect for 2004 - 2005 Subaru Impreza WRX STI 4DR owners who want to enhance their car's appearance. Whether you're a car enthusiast looking to customize your ride or a racer aiming for better aerodynamics, these flares are a great choice. They are made of FRP material and come in a 2 - piece set. Professional installation is needed to ensure a perfect fit.