- Shape: Round with flat bottom - Height: 1.62" (41 mm) - Width: 4.75" (121 mm) - Length: 6.625" (168 mm) - With flange - Flange length 13mm - Zinc plated metal top - Replaces OEM 29400045 air filter element. 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 than comparable foam or paper type filters.