- Shape: Round with flat bottom   - Height: 1.625 in (41mm)   - Width: 5.813 in (148mm)   - Length: 7.5 in (191mm)   - Replacement for OEM 29633-08 filter element.   K&N is the world-wide standard in high-end quality performance air filtering systems. They are washable and can be used as stock replacement. The 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. The K&N filter elements have a steel body with cotton between the screens. K&N filters decrease service intervals, are better flame resistant and will last much longer than comparable foam or paper type filters.