K&N AIR FILTERS. Ideal for extended use in dirty and dusty off-road riding and provides clean carburetion even at high altitudes. K&N replacement air filters are washable and reusable and provide high air flow with excellent filtration.Additonal Fitment:1997-2001 YAMAHA 600 YFM600 Grizzly1987-2004 YAMAHA 350 YFM350X Warrior1994-2005 YAMAHA 350 YFM350FX Wolverine