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Lamborghini
Lamborghini has done some research into hybrid powertrains but most of their focus has been on weight reduction. An extreme example would the Sesto Elemento concept car, so-named because it's made almost entirely from carbon, the sixth element on the periodic table. Even the wheels and suspension are made from carbon fiber, a lightweight but very strong material that's also outrageously expensive.


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Last updated March 15 2011: 6:51 AM ET
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