K&N 33-3042 Replacement Air Filter BMW X4 L4-2.0L DSL; 2014Description K&N 33 3042 Replacement Air Filter BMW X4 L4 2. 0L DSL; 2014 K&N washable, reusable High Flow Air Filters feature a layered, oiled cotton media designed to improve airflow and capture contaminants. These filters are engineered to provide an increase in horsepower and are built to last for the entire lifespan of the vehicle. K&N drop in replacement filters are designed for easy installation into the factory air box. Each performance air