6 Secret Muscle Cars

2016 Chevrolet Impala
2 of 16

2016 Chevrolet Impala

Once an oversized cruiser with a striking v-shaped rear deck, then a big-block muscle car, the Chevrolet Impala has since morphed into a family sedan. But while engineers toned down the Impala's styling and slimmed its size, they left at least one memento from its muscle car days: a brawny engine.    

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