A well worth addition IMO. Nice one
Here is mine I did 10 years ago or so. All aluminium, top scoop and bottom plate are 2mm the scoop plate is 3mm. I folded up the scoop and hit TIG welded, and to the scoop plate. I sandwiched some aluminium grill/mesh in-between the bottom plate and scoop plate, Sikaflexed them together and then got it powder coated. Reason I made mine was, that with my truck living outside, I found turning the heater on created instant mist/steam….After removing the stock plastic grill, I found all sorts of rubbish in the duct, along with the duck bill water drain being clogged. So any rain would fill up and pool in the duct, flowing into the vent system. Hasn't been an issue since.
http://www.aulro.com/afvb/attachment...t-imag0998.jpg
http://www.aulro.com/afvb/attachment...t-imag0999.jpg