Subaru Legacy Air-Box Plug

Fans of the 4th-Generation Subaru Legacy and Outback sometimes like to remove the resonator from the bottom of the stock air intake box, because you can hear the turbocharger more clearly, and you get a little bit more growl at full throttle.

However, that creates a pathway for grime to get into the filter. So after buying a car with a de-resonated intake box, I wanted to plug that hole.