K&N off-road replacement air filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. Generally no jet changes are required with just a K&N filter element. K&N replacement air filters are washable and reusable and provide high air-flow with excellent filtration.This Part Fits:YearMakeModelSubmodel2002Arctic Cat375 Auto 2x4Base2001-2004Arctic Cat400 2x4Base2003-2004Arctic Cat400 2x4 AutoBase2002Arctic Cat400 2x4 FISBase2001-2005Arctic Cat400 4x4Base2003-2004Arctic Cat400 4x4 ACTBase2002-2005Arctic Cat400 4x4 AutoBase2003-2004Arctic Cat400 4x4 Auto ACTBase2005Arctic Cat400 4x4 Auto LEBase2003-2004Arctic Cat400 4x4 Auto MRPBase2004-2005Arctic Cat400 4x4 Auto TBXBase2005-2006Arctic Cat400 4x4 Auto VPBase2002Arctic Cat400 4x4 FISBase2003-2004Arctic Cat400 4x4 MRPBase2005-2006Arctic Cat400 4x4 VPBase1998-2002Arctic Cat500 4x4Base2000-2002Arctic Cat500 4x4 AutoBase2002Arctic Cat500 4x4 Auto TBXBase