OPELS Kadett B was released in 1966 and had then grown in all directions, but was based mainly on the same technology as its predecessor. All Kadett B had transverse springs at the front, the 1966 and 1967 models had leaf springs at the rear, the 1968 to 1973 model was equipped with coil springs, except for the Caravan which was allowed to keep the leaf springs. An odd version was called Olympia, and was a slightly more luxurious version than the Kadett, but apart from the decoration and engines, it was identical to the Kadett. Larger engines also came. The standard was now 1100, but also 1500, 1700 and later also 1900 cc in the popular Rally-Kadett version. The large engine of 90 horses, gave the Rally Cadet good performance, and they were used extensively in
In the 1970 RAC Rally, Opel's Rally Kadette came second, third and fourth, with a great OPEL team consisting of the Swedes: Bus-Ove Eriksson, Lillebror Nasenius and Janne "Satan" Henriksson in the lead. 

Opel tillverkade även en ännu starkare Rally-Kadett, med 1900 cc motorn trimmad till 106 DIN hk. Denna version fick tillnamnet ”Sprint”, i likhet med den större Rekord när denna var försedd med den trimmade motorn. 
Detta exemplar är just en Kadett ”Sprint” i ett fantastiskt skick.