Essential components of the classical fuel injection are displayed. Besides the suction tract of aluminum the injectors are important. They flow into the inlet manifolds immediately in front of the cylinder head. They are being supplied via a larger distributor pipe, in this case a square pipe. Clearly visible are the 2-pole connections of the injectors. The system pressure regulator is arranged to the right above, behind the intake manifold. We are dealing with a cable-controlled throttle valve. You may recognize this from the idle running-filling regulator in the foreground. It controls a bypass around the throttle valve. To the left of it the inlet manifold connection fits to the spring chamber of the system pressure regulator.