This Perrin drop - in air filter is a must - have upgrade for your Subaru. It's designed to fit perfectly in the 2008 - 2021 WRX, 2008 - 2018 STI, and 2005 - 2009 Legacy GT. With a 2 - stage foam filtration element, it significantly increases airflow in your stock air box, giving you a boost in power and torque. You'll also notice a quicker throttle response. The open - cell foam filter, coated with a special oil, effectively catches dirt particles while allowing air to flow freely. It's easy to install, taking only about 10 minutes. And it comes with a 5 - year manufacturer warranty. Plus, you can clean and re - oil it for long - term use.
Using this Perrin drop - in air filter is easy. First, locate your stock air box. Open it up and carefully remove the old filter. Then, place the new Perrin filter in the same spot. Make sure it fits snugly and close the air box. You're all set! When it comes to maintenance, keep an eye on the filter. Once it looks dirty, you can clean it with a suitable filter cleaner. After cleaning, let it dry completely and then re - oil it using the recommended oil. This will keep the filter working at its best. Remember, always follow the manufacturer's instructions for cleaning and re - oiling. And if you have any issues, the 5 - year warranty has you covered.
