- 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.