356C 1963-65

The final iteration of the 356, the 356C, made its debut for the 1964 model year. This version boasted disc brakes on all wheels, radial Pirelli Cinturato tyres, and an option for Porsche's most potent pushrod engine to date, the 95hp (71kW) "SC". In 1964, production of the 356 reached its zenith with 14,151 units, coinciding with the introduction of its successor, the new Porsche 911, to the US market (preceding its European debut). Despite the arrival of the 911, demand for the 356C remained robust, especially in the early years of the more refined 911.

The final ten 356s, all cabriolets, were assembled for the Dutch Rijkspolitie, the predecessor of the Netherlands police force, in March 1966, designated as 1965 models. Porsche vehicles proved highly effective for traffic control and speed enforcement on Holland's expressways, leading the Dutch national police branch to continue using Porsche 911s well into the era of water-cooled engines.