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 KTM 85 (2004), 125, 200, 250, 300, 380 (1998-2003), 400 LC4, 400 LC4 (1 hole), 520 LC4, 520 LC4 (1 hole) (2000), 524 LC4 (2003).