Toyota 4Runner 4th Gen vent solution. Off road your 4th Gen 4Runner without a stock bumper? Finding the interior dusty after a day on the trails? The vent solution is for you. Print a diver and passenger side cover. Glue them to the stock vent with the grill pointing rearwards and the dust is reduced. An additional filter frame is available to print. Cut and use any filter material such as a charcoal filter. Glue filter frame to vent and the system is complete. 

This was the first edition of the design with a filter behind the vent.