cylinder head with 3 valves 2 inlet valves with separate intake ports, one exhaust valve. Actuation of the valves (fine springs ensure easy actuation of the valves). Roof-shaped combustion chamber with lateral spark plugs. description ordernumber 1200 see also: nozzle holder with two-spring injection nozzle and needle-displacement sensor injector for engines with direct petrol injection (GDI) four-valve cylinder head, diesel direct injection, lorry cylinder head with direct petrol injection (GDI)