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:2001-2001 POLARIS 325 Magnum 325 4x4 Built After 1/8/012004-2004 POLARIS 330 Magnum 330 4x4 Mossy Oak2001-2001 POLARIS 325 Trail Boss 325 2x4 Built After 12/1/002002-2002 POLARIS 325 Magnum 325 2x42002-2002 POLARIS 325 Trail Boss 325 2x42002-2002 POLARIS 325 Magnum 325 4x42004-2005 POLARIS 330 ATP3302003-2005 POLARIS 330 Magnum 330 2x42003-2006 POLARIS 330 Magnum 330 4x42008-2009 POLARIS 330 Trail Blazer 3302003-2009 POLARIS 330 Trail Boss 3302001-2001 POLARIS 325 Magnum 325 2x4 Built After 1/8/01