K&N Filter Kit + Air Filter Cleaning Kit Yamaha YZ450F / FX / WR 19-22

Designed for quick foam or filter maintenance after initial installation.
Specifically designed with special supports and dry foam for maximum off-road protection.
Developed to work without the foam for increased trail performance or with the foam for an increase in filter resistance on the trails.
Fits directly into the OEM airbox with application-specific sealing ensuring a precise fit.2019-2020 YAMAHA WR450F; 2019-2020 YAMAHA YZ250F; 2018-2020 YAMAHA YZ450F; 2019-2020 YAMAHA YZ450FX

Service kit for K&N filters, with protective oil spray:

K&N Recharger Filter Kit 6.5oz Spray Bottle