I know you guys love to do mods, but in this case I think it would work better if you just bought an Ionic Breeze air purifier from Brookstone (they make 'em for cars and trucks also) and plug it into the electrical outlet. I have the big ones you get for the house. They are totally silent and work great, no filter to change ever, just wipe the mirror plates clean and your good to go. They pick some nasty black crap out of the air (looks exactly like soot) must be all the diesel and pollution we get here in Los Angeles.
