Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The K&N 57i induction kit for 2002–2007 Subaru Impreza WRX/STi replaces the restrictive factory airbox with a vehicle-specific high-flow washable and reusable air filter and adapter hardware. Engineered to increase airflow across the RPM range while capturing more dirt for longer service intervals (up to 100,000 miles), the kit includes K&N warranty coverage. Not legal for sale in California or states adopting its emissions rules.
K&N 02-07 WRX/STi 57i Performance Intake Kit
