Feature of this version with intake manifold pressure:
WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.
The connection for the vacuum hose of the fuel pressure regulator is located in the intake manifold after the throttle.