The Silent Rider ATV Silencer BT-74 Polaris Sportsman 335/600/700(1996-11)Sportsman 400(1996-07)(2010-14) Sportsman 450(1996-11)(2016-21) Sportsman 500(1996-13)Sportsman 570(2014-20)Sportsman 800-Single Port(1996-13)