These trick flapper valves are installed in the top side of the airbox to provide additional airflow to the engine. They are activated by airbox vacuum. When the stock intake begins to plug in deep powder snow conditions, these valves open to deliver the necessary airflow that the engine demands. This substantially improves consistency when running in deep powder snow conditions. Sold per pair.
Verify fitment by year/make/model before install. If you're unsure, message our team — we'll confirm before you cut into anything.
Available shipping options are shown at checkout. Returns are available on eligible uninstalled parts in original packaging.
