In 1965, the engine was enlarged for use in the all new Kadett B. Displacement was 1,078 cc (66 cu in) with a bore enlarged to 75 mm (3.0 in) stroke remained at 61 mm (2.4 in).
The 11N (normal compression) produced 33 kW (45 PS) and 37 kW (50 PS) after 1971.
The 11S produced 40 kW (55 PS); in 1966 a special power version was introduced, the 11SR with 44 kW (60 PS).

Applications:
1965-1973 Opel Kadett B
1967-1970 Opel Olympia A
1968-1970 Opel GT 1100
In 1965, the engine was enlarged for use in the all new Kadett B. Displacement was 1,078 cc (66 cu in) with a bore enlarged to 75 mm (3.0 in) stroke remained at 61 mm (2.4 in). The 11N (normal compression) produced 33 kW (45 PS) and 37 kW (50 PS) after 1971. The 11S produced 40 kW (55 PS); in 1966 a special power version was introduced, the 11SR with 44 kW (60 PS).
Applications:
1965-1973 Opel Kadett B
1967-1970 Opel Olympia A
1968-1970 Opel GT 1100
Opel OHV engine