I was along for this trip and the video doesn't really do the intake the justice it deserves. The Tacoma air filter was roughly 1/3 dirty where as the 4Runner filter even with the pre filter was about 2/3 dirty. The conditions we were in were very extreme in terms of dust. It wasn't like we ran into one or two oncoming vehicles we were in a constant state of dust as there were a couple of lead vehicles in front of us and due to filming we were closely bunched up most of the time. Often we were too close as we'd lose sight of the vehicle in front of us. It works just like a snorkel but Toyota doesn't call it a snorkel because they want to keep idiots from submerging their rigs in water and wrecking electronics and other components that are not sealed. I normally don't get out of the Land Cruiser realm so I hope this is an appropriate share. BTW as a LC guy I really liked the Tacoma and for someone who wants to bomb down fire roads and through the desert the Fox shocks are pretty awesome too.