Just what is a "Super Sport?"

The Chevrolet Corvette SS is a sports racing car built by Chevrolet in 1957. The car raced once at the 1957 12 Hours of Sebring before Chevrolet withdrew from all racing activities in response to a ban that year by the Automobile Manufacturers Association for all of its member companies, which included GM.

The official name for Project XP-64 was the Corvette SS. This was the first Chevrolet to wear the "SS" badge. When Cole announced the car, it was described as an engineering project researching various features to improve both performance and safety.

By Drew Lindberg; cropped and lightly edited by uploaded Mr.choppers - P1191360.JPG, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=20596287

The Corvette SS was Chevrolet's first purpose built race car. It was considered the successor to the three "SR" cars that raced at 1956 in Sebring, and the two SR-2 Corvettes, which were based on a production Corvette chassis.

Two cars were completed; the development car called the "mule", and a full-spec Corvette SS. Three additional Corvette SS chassis were built, but not turned into complete cars. Some references report that Mitchell later bought the complete development mule for just US$1 as the base for his Stingray racer. In interviews Shinoda and Mitchell both describe Mitchell buying a spare SS chassis for US$500. He estimated the value of the chassis at US$500,000.

After its career ended, the Corvette SS remained in storage at various locations within GM until Duntov convinced John DeLorean, Chevrolet’s new general manager, to donate the car to the Indianapolis Motor Speedway.