K & N washable High Flow Air Filter Element Fits: > 17-21 Touring; 17-21 Trikes.

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.

For 17-21 FLHR/FLHTCU/FLHTCUTG/FLHTK/FLHTKL/FLHX/FLHXS/FLRT/FLTRU/FLTRK/FLTRX With OEM wedge styled air cleaner housing

replace HD OEM Numbers: 29400212
Part Number 10113975 / HD-1717