The 2011+ Subaru STI Apexi Replacement Drop-In Air Filter is designed to increase horsepower and acceleration while providing excellent filtration. The Apexi Panel Filter is a stock replacement air filter. Increase airflow and filtration over the stock unit with this maintenance free dry apexi filter.
- 2011+ Subaru STI Apexi Replacement Drop-In Air Filter
- Washable and Reusable
- Fits directly into factory air box