Hood scoop

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A hood scoop (North American English) or bonnet scoop (Commonwealth English), sometimes called bonnet airdam and air dam, is an upraised component on the hood of a motor vehicle that either allows air to directly enter the engine compartment or appears to do so. It has only one opening and is closed on all other sides. Its upraised design allows it to effectively channel air directly into the engine compartment without the need to pass through the normal intake ducting.^[1] Some hood scoops are always closed and serve as decoration rather than performance.