The K&N round air cleaner assembly with a 5.25" inlet ID and 5" height uses a 1-1/4" drop base and is designed for engines with round element housings. Each complete assembly includes the base, K&N element, and top plate, and delivers increased airflow over similar assemblies while the washable, reusable K&N filter allows long-term serviceability.
K&N Round Air Filter Assembly 5.25in ID / 5in Height / 5.125in Neck Flange / 1 1/4in Drop Base