- Shape: Oval   - Height: 2.438 in (62 mm)   - Inner Wire: No   - Inside Length: 8.375" (213mm)   - Inside Width: 4.25" (108mm)   - Outside Length: 9.75" (248mm)   - Outside Width: 5.5" (140mm)   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.