K&N drop-in High-Flow replacement air filter for Citroën C4 (2004–2008) and related models uses layered, oiled cotton media to improve airflow while capturing contaminants and is designed to fit the factory airbox. Washable and reusable for the vehicle lifespan, the filter is backed by K&N's lifetime coverage and aims to provide increased airflow and sustained engine protection without permanent replacement.
K&N Replacement Air Filter 04-08Citroen C4/05-10 Xsara/08-10 Berlingo / 05-11 Peugeot 206/05-09 307