I don't doubt that, but that doesn't mean you get that gain on the 3800.
All their intake consists of is a bent plastic tube (which heat soaks pretty bad), a K&N filter, and a crappy heat shield. If they had really done some engineering and fitment R&D, they would've come up with something like this:
http://img.photobucket.com/albums/v3...2/DSC02411.jpg