Features: DESIGNED TO FIT IN THE FACTORY AIR BOX EXACTLY LIKE ORIGINAL FILTER THE BEST SELLING REPLACEMENT AIR FILTER FOR COMPETITION MOTORCYCLES AND ATVS UNIQUE TWO STAGE DESIGN ALLOWS FOR EASY AND COMPLETE CLEANING DUAL LAYER OF FOAM, CAN BE SERVICED SEPARATELY THIN ULTRA SEAL BASE IS VIRTUALLY IMPOSSIBLE TO TEAR AND HAS A BUILT-IN "GREASE GROOVE" USED BY FACTORY YAMAHA, KAWASAKI AND SUZUKI OFF-ROAD Designed To Fit: 2006 Kawasaki KX250F 2006 Kawasaki KX450F 2007 Kawasaki KX250F 2007 Kawasaki KX450F 2008 Kawasaki KX250F 2008 Kawasaki KX450F 2009 Kawasaki KX250F 2009 Kawasaki KX450F 2010 Kawasaki KX250F 2010 Kawasaki KX450F 2011 Kawasaki KX250F 2011 Kawasaki KX450F 2012 Kawasaki KX250F 2012 Kawasaki KX450F 2013 Kawasaki KX250F 2013 Kawasaki KX450F 2014 Kawasaki KX250F 2014 Kawasaki KX450F 2015 Kawasaki KX250F 2015 Kawasaki KX450F 2016 Kawasaki KX250FManufacturer Part Number: NU-2399ST