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: common rail injector with magnetic coil at the bottom feed pump, diesel (single-acting) pumps model case distributor-type fuel-injection pump with electronic governor