The 1957 Corvette came from the factory with seat belt brackets, the actual belts were a dealer installed option. 1957 marked the first year fuel injection was available, 1,040 cars were equipped with the Rochester Ramjet Fuel Injection (known as "Fuelies"). Road and Track measured a 0-60 time of 5.7 seconds in one of the new "Fuelies". It was also the first year for the optional 4-speed transmission, only 664 cars were equipped with the 4-speed from the factory. Both white plastic and chrome plated steel shifter knobs were produced, the white plastic is usually seen on the later cars. The 579E option included a tachometer mounted on top of the steering column and a fresh air intake. The base engine has painted valve covers with the Chevrolet script, optional engines have 7 or 9 fin cast alloy valve covers.