Thanks Eddles, good pics. I am always wondering what underbody aero mods the factory guys are focusing on (since they have wind tunnels and such) vs. what we amateurs are coming up with.
Your ECO4 and cars like the Civic Hybrid seem to get noticeable improvements targeting specific areas despite leaving some other areas alone (like exhaust tunnels and wheel wells relatively exposed). Of course what makes a difference all depends on the specific vehicle's shape and its major sources of drag, and to know that you need CFG and controlled experiments, so we might as well mod everything that seems like it has a reasonable chance of improving aero.
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