I was looking at cold air intakes on the web. the standard type with k&n filter with a cover around it. The cold air thru the cowl type. then I ran on a thru the fender mod seen on a fu Mustangs was looking at the stock air box and this would be verry ease to do and the interfender panel would keep water out .I know this mod would be ploblem on one if you were crossing deep water but on a DD I cant see any ploblems.looked at the stock air box has about 6 sq" area of intake if you cut a 4 " hole with a tube into the fender would would have about 12 1/2 " of area .Let me know what you guys think about this mod.