KN XStream Series Motocross Air Filters take performance to the next level with the addition of a filter within the filters 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-coated aluminum wire mesh, incorporated into a backfire screen, protects the filter element from harmful debris. A custom base seal ensures a precise and secure fit. KN air filters are washable and re-usable and they come pre-oiled and ready to use. Ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. Pleated cotton filter allows for 2 to 3 times the filtration area of a foam filter, increasing filtration and air flow. Easy installation, changing and cleaning. Filter Specifications: Product style: Unique air filters. Filter material: Cotton gauze. Flanges: None. Height: 4.5 inches (114 mm). Weight: 1.5 pounds (0.7 kg).