High-pressure pump (petrol direct injection) The latest generation of high-pressure petrol pumps from Bosch, which can be used for fuel pressures of more than 200 bar. Tappet and solenoid can clearly be seen. The tappet can be moved. description ordernumber 1337 see also: Audi cylinder head with 5 valves Mercedes-Benz cylinder head M 270 with camtronic tandem hydraulic pump, PC cylinder head four-valve mechanism