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: injector for engines with direct petrol injection (GDI) side-valve 4-stroke engine with timing wheel cylinder head with direct petrol injection (GDI) cylinder block with wet liners