Machine Ops Blunt Replacment Air Filter Revolutionary backing plate that promotes smooth airflow into the carb/throttle body Hidden crank case breathers High volume best in filteration K & N air filter included Smaller filter elements gives more knee clearance Available in Machine Ops™ finish Machine Ops™, RSD's newest finish, is a fusion of textured natural aluminum and detailed machining that exposes the true beauty of their aluminum alloy; they then dip the fresh machined parts in a slick clear anodize to protect the surface while keeping its raw aesthetic protected Includes all mounting hardware Made in the U.S.A.