K&N KT-4511XD Replacement Air Filter 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