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American auto companies are choosing brawn over brains at the 25th Detroit Auto Show with a Chevy Corvette and Silverado truck grabbing top honors as U.S. auto sales head into a five-year recovery. The turnaround certainly puts the wind at the back of incoming GM CEO Mary Barra as the industry's first female leader, but the competition is coming on strong and heavy. The F150 is Ford's top offering and will be made largely out of aluminum, without compromising on the steel appeal. Desite the hype, critics say not so fast on the use of so much aluminum. 

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