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

Comes in 57mm and 61mm width

then air drying it

Top quality craftsmanship

Radium FPRs are tested using a common high flowing Walbro 255lph pump

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