K&N, air filter element

Fits stock S&S B/D air cleaner housing and most aftermarket teardrops (excl. steel teardrop housings); Most 7" round housings; Some Mikuni housings. - Shape: Round - Height: 2.188" (56mm) - Inside Diameter: 4.625" (117mm) - Outside Diameter: 6" (152mm). K&N is the world-wide standard in high-end quality performance air filtering systems. Made from multiple layers of pre-oiled woven cotton gauze material that is mesh screen protected. They are washable and can be used as stock replacement. Filter elements are designed with a ribbed surface that will give you up to 5 times more filter area than a regular replacement filter; dramatically increasing airflow. K&N filters decrease service intervals; are better flame resistant and will last much longer and breath better than comparable foam or paper type filters.