In May 1965 the base engine was enlarged to a downtuned version of the 1.3 L unit already used in the 411-series SS, now with a single (twin-barrel) carb and developing at 5,200 rpm. The transmission remained a three-speed. The SS was downtuned somewhat, now with but still with the four-speed unit. More excitingly, a twin-carb 1.6 L SSS model was launched the same month, with no less than . This began a line of famous Nissans in Japan, with the Bluebird SSS a mainstay of the range until its deletion in 2001.