Okay, if that won't work then melt an inconspicuous blob of material with a TIG welder on the air breather hold-down screws to keep the lid a half inch above the air filter to let more air in. The breather lid will ride slightly above the air filter and the wing nuts will tighten as normal.

You can just lift the lid to the point where it still appears to be covering the element, mark the position, and set your weld. A second nut on the bottom of the breather will keep the bottom section still.