Cylinder head

A cylinder head for an internal combustion engine, having a prechamber which is arranged in the cylinder head and is defined by an inner wall surface of a prechamber wall, wherein the prechamber comprises a first chamber portion and a second chamber portion, wherein the first chamber portion has a greater maximum diameter (D) than the second chamber portion, wherein at least one ignition device opens into the first chamber portion, and the second chamber portion comprises at least one overflow channel for the passage of flow into a combustion chamber which adjoins a fire deck, wherein at least one inner wall surface of the first chamber portion comprises at least one first flattened portion, wherein a plurality of flattened portions selected from the group consisting of first and second flattened portions are arranged distributed around the circumference of the first chamber portion, and wherein the flattened portions selected from the group consisting of the first and second flattened portions are arranged uniformly distributed around the circumference of the first chamber portion.