The K&N X-Stream top replaces the top of an existing round air filter to increase airflow and breathing capacity; this 14 in OD red X-Stream top is washable and reusable like other K&N filters. It delivers an inverted-top design that increases filter surface area, and it is intended to be used with compatible round K&N filter bases to improve airflow without replacing the entire filter element.
K&N X-Stream Top Filter X-Stream 14in OD - Red