K&N Replacement Air filter

K&N filters are designed to achieve high, virtually unrestricted air flow while maintaining filtration levels critical to ensure long engine life. These high quality K&N air filters are reusable and washable, and they fit many air cleaners as stock replacement. The elements are designed with a ribbed surface that will give you up to 50% more filter area than a regular replacement filter, dramatically increasing air flow. - Designed to provide increased horsepower and acceleration. - Pleated cotton media provides a large filtration area offering low restriction and long service intervals. - Multi-layers of woven cotton gauze media offers excellent filtration. - Fits directly into OEM Airbox with application specific Sealing Bead ensuring a precise fit. - No fuel management modification are normally required to obtain increased performance. - Washable and reusable / Fitment: BMW: 99-05 R1100S; 99, 02-05 R1100S ABS; 02 R1100S Boxer Cup; 03-05 R1100S Boxer Cup Replica; 02 R1100S Sport; 00 R1100S Sports Boxer; 00-01 R1100SA; 00 R1100SA SE