This AEM cold air intake is perfect for Subaru WRX STI owners who want to enhance their vehicle's performance. Whether you're a daily commuter looking for a bit more power or a weekend racer seeking an edge, this intake is for you. It fits 2019 - 2021 WRX STI Base and Limited models, as well as the 2019 S209. The system includes an oversized AEM DRYFLOW synthetic washable air filter, a mandrel - bent aluminum intake tube, and high - quality hardware. Installation is quick, usually taking less than 90 minutes. Under normal highway driving, you can go up to 100,000 miles between filter services.