K&N 19-21 Kawasaki KX450/KX450X/KX250/KX250 Replacement Air FilterK&N XStream Series Motocross Air Filters take performance to the next level with the addition of a filter within the filter's top in order to add even more filtration area for high air flow and capacity. Each filter piece has pleated media which creates a large surface area that provides high airflow and great dirt holding capacity for extreme conditions. The two piece design eases installation and removal on modern narrow framed MX bikes. The epoxy