The K&N panel-style replacement air filter for 2009–2012 BMW X5/X6 4.4L V8 is a washable, reusable High-Flow element designed to install as a drop-in into the factory airbox. K&N’s layered, oiled cotton gauze media aims to improve airflow and filtration and the filter is engineered to provide increased performance over stock disposable elements. It’s backed by K&N’s long-term warranty and intended for the listed BMW applications.
K&N Replacement Air Filter 09-12 BMW X5/X6 4.4L V8 Panel Filter