In 1965, with the opening of the Daisan Keihin Road, the first-generation Silvia (CSP311) was selected as a patrol car by the Kanagawa Prefectural Police. Since the speed limit on the No.3 Keihin was 80km/h, it was decided that a car capable of performing well at high speeds was needed for law enforcement. The Silvia, with its top speed of 165km/h, fitted the bill. This was the first time anywhere in Japan that a high-grade sports car had been put on police patrol, so it was front-page news. Silvia was delivered to the Kanagawa Prefectural Police HQ on December 9, 1965.
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