- For national US and Canadian models   - Shape: Round with flat bottom   - Height: 1.625" (41mm)   - Width: 5.688" (144mm)   - Length: 7.125" (181mm)   - Replacement for OEM 29314-08 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.    Note: HDI stands for H-D International (= export models). National models are H-D models as sold in the USA.