The promising young stars of 1966 took part in the championship again. Goedemans became champion in his first full season; Wim Loos started the year with a shock move from the Racing Team Holland (leaving the brand-new Carrera 6 and possible F3 races behind) to Rob Slotemaker, who bought two brand new Alfa Romeo GTA's and a Lotus 47 for the two of them. Apart from this, a test with BRM was arranged, later in the year Loos would have a test with Ferrari. He started the season well, winning his class or finishing second behind Slotemaker, staged or not. Chiotakis, in another GTA, never had a chance.
Alas, a last-minute entry in a standard Alfa Romeo at Spa ended Loos' promising career. Chiotakis took the hollow 1600 cc title, after a futile disqualification of Slotemaker in the last race. Oskamp was dominant in 1300, just like Veder in the 850 class - they were champion after three races. Gerard van Lennep took the title in the 700 class, the last champion was Pon in the Porsche.