Outlaw Racing Super Seal Air Filter Made In USA Polaris 300 2x4 4x4, 400L 2x4 4x4, Big Boss 250 4x6 300 6x6 350L 6x6 400L 6X6, Scrambler 400 4x4, Sport 400L, Sportsman 400 4x4, Trail Blazer 250, Trail Boss 250 2x4 4x4 250R/ES 350L 2x4 350L 4X4, Xplorer 300 4x4 400 4x4 Superseal greaseless filters make the chore of servicing airfilters a breeze . Superseal neoprene gasket base seals perfectly even in the most extreme conditions without the hassle of messy grease . Extra wide sealing ring for air tight seal. Constructed with bonded dual layer foam.