To provide an under cover structure that excels in aerodynamic characteristics, rigidity, and sound and heat insulation.
An under cover 11 has a hollowed double wall structure consisting of an upper wall 12 and a lower wall 13 that is made generally flat. An improved straightening effect on underfloor airflows offers increased down force and an elevated anti-lift effect. The double wall structure also provides increased rigidity and an improved sound/heat insulating effect.
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