Mitsubishi Concept X Rally
The way it is shaped and has an inlet and outlet ... it would probably act as a spoiler.... it would create downforce, and it feeds directly into the spoiler....
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Formula 1 cars use similar concepts, most notably McLaren. The use the "horns" to direct the air flow over the center part of the spolier, which also has a differnt profile than the outer edges.
sadly a DSM might be more reliable...





