Audi cylinder head with 5 valves and camshaft adjustment recognition of the arrangement of the five-valve technique operation of the valves by use of weaker springs recognition of the channels by varying colours Porsche camshaft adjustment can be operated description ordernumber 1288 see also: Common-rail high pressure pump with fuel-delivery regulation valve and injector nozzle holder with two-spring injection nozzle and needle-displacement sensor high-pressure pump for engines with direct petrol injection (GDI) in-line injection pump with RSV flyweight governor