K&N ATV Air Filter + Precharger 2010 Polaris Sportsman 850 XP PL-5509 + PL-1003PK Designed to provide increased horsepower and acceleration Specifically developed for Off-Road, Motocross, ATVs, UTVs and Side by Sides Pleated cotton media provides a large filtration area offering low restriction, high-capacity and long service intervals Multiple layers of woven cotton gauze media offers excellent filtration Fits directly into OEM air box with application specific sealing bead ensuring a precise fit