Twin Air filters are designed to increase airflow while ensuring the highest level of protection from dirt/dust. Design, high quality materials and superior construction deliver unbeatable performance and protection. For Husaberg (2000-2003), 450 FE, 450 FEE, 450 FC, 450 FS, 570 FE, 570 FEE, 570 FC, 570 FS (2008).