Perrin Drop-In Panel Filter WRX / STI (2002-2007) Nissan this air intake system features

this air intake system features a washable/reusable conical air filter

- Excellent turn-in response and cornering

The Mishimoto fan shroud includes the aluminum shroud with two 12" electric fans pre-assembled and all necessary mounting hardware

The specific timing of when the reflected sound waves re-join the main exhaust flow creates a one-hundred-and-eighty-degree out-of-phase sound wave that cancels out problematic frequencies

Perrin Drop-In Panel Filter WRX / STI (2002-2007) Nissan this air intake system featuresThe Perrin drop in air filter for the Subaru WRX & STI uses a 2 stage foam filtration element to improve airflow in your stock air box; providing improved power and airflow while removing harmful particles from the incoming air. Using a special oil coating, the foam filter catches dirt particles while allowing air to pass unimpeded through the high flow foam. This WRX STI 2002 2007 filter can be cleaned and re oiled using the Perrin cleaning kit, sold