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The K&N drop-in replacement air filter for Audi A4 1.8L is a washable, reusable High-Flow unit built from layered, oiled cotton media to improve airflow while capturing contaminants. It's designed to install easily into the factory air box, is covered by K&N's lifetime limited warranty, and is offered for Audi A4 L4-2.0L applications from 2009 to 2016.
K&N Audi A4 1.8L Drop In Air Filter
