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SS: Super Sport or Super Stock?
The double S stands for “Super Sport.” It has been Chevrolet’s prime designation for performance models since 1961. Over the years, Chevrolet produced the Impala SS, Camaro SS, Nova SS and Chevelle SS, among others. They were even close to introducing the Corvette SS. But sometimes, SS can stand for “Super Stock,” which was a popular drag racing class back in the day for stock and factory models.