Abstract: A cylinder head arrangement for an internal combustion engine, having a combustion chamber portion for defining a combustion chamber above a cylinder in which a piston is reciprocable; two inlet valves lying substantially to one side of the combustion chamber portion, and two exhaust valves lying substantially to the other side of the combustion chamber portion; and a fuel injector disposed in an edge region of the combustion chamber portion at the exhaust valve side thereof, and arranged to inject fuel generally across the combustion chamber portion towards the inlet valve side thereof.