I'm not so sure that those airtabs do anything, but I'm not an expert. Seems you have them too close together and the ones of the side might not do anything with the bad flow that is probably already there.
I'd stick with the air dam for now and focus on making it look better. I had a belly pan on my focus, and in my opinion, it's a pain in the ass.
rear wheel skirts might be more up your all alley and if they're done well, would look really good on your car.
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Aerospace Controls Engineer.
Currently driving a mostly stock 2014 Mitsubishi Mirage DE hatchback.
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