What is the purpose of the plastic box situated inside the fender that is attached to the air intake? I just have a rubber tube attached to the air filter that goes into the fender area, and it seems to work pretty well. I de-snorkled my LX450, tired of all questions and stares, and the stock intake looks pretty darn high and protected on my lifted truck anyways. Looking at my scanguage, I might have gained .5 mpg by removing it too.