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K&N drop-in air filter for select Subaru applications replaces the factory element with a washable, reusable high‑flow filter to improve airflow while protecting the engine. K&N’s layered oiled cotton media is engineered for increased flow and longevity and is backed by a long‑term warranty. This filter fits Subaru Baja, Forester, Impreza and Outback models (1999–2008) and 2004–2007 STI applications.
K&N 04-07 Subaru STi K&N Drop In Air Filter
