I know this is a reply to a very old post, but it might do some people some good since no one answered correctly.
The Ford Motorsport GT-40 intake does have a CARB E.O. number, it is D-308-10, as one of the components of the "5.0L Mustang Kit" that Ford Motorsport used to market.
This, again, does not apply to Explorer Gt-40 style intakes, but only to FMS part # M-6001-A50, which was a kit including the upper M-9424-A51 and lower M-9461-A50 GT-40 intake.