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: nozzle holder with hole-type nozzle Roots supercharger Piezo-injector with high-pressure pump pump-lines-nozzle