K&N's round custom air cleaner assembly is built for engines using a round element housing and includes base, element, and top plate. It ships with K&N's washable, reusable air filter to improve airflow compared with many assemblies of this type; dimensions are 5-1/8in flange, 11in outside diameter, and 3-3/8in height. Aimed at racers and builders seeking higher flow in a round housing.
K&N Round Air Filter Assembly 5-1/8in FLG 11in OD 3-3/8in