This Perrin drop - in air filter is a perfect fit for 2002 - 2007 Subaru WRX, 2004 - 2007 Subaru STI, and 2004 - 2008 Subaru Forester XT. It uses a 2 - stage foam filtration element to enhance airflow in your stock air box. You'll get improved power and clean air as it removes harmful particles. The open - cell foam filter with a special oil coating catches dirt while letting air flow freely. Installation is a breeze, taking just about 10 minutes. And it comes with a 5 - year manufacturer warranty. You can clean and re - oil it using the separately - sold Perrin cleaning kit.
Using this Perrin drop - in air filter is super easy. First, locate your stock air box in your Subaru (WRX, STI, or Forester XT). Then, simply remove the old filter and drop this new one in. It should take about 10 minutes to install. When it comes to maintenance, keep an eye on the filter's condition. Once it gets dirty, use the Perrin cleaning kit (sold separately) to clean it. After cleaning, re - oil the filter following the instructions on the cleaning kit. Remember, this filter has a 5 - year manufacturer warranty, so if you have any issues within that time, reach out to the manufacturer.
