Intake Air Duct
The air intake duct consists of two lines with engine-mounted intake silencers. The arrangement leads to minimum pressure losses on the intake and pressure sides. The air is drawn in on both sides of the engine through a duct behind the front grille. An air intake resonator on each side enhances the acoustic characteristics of the system.
Hot film air mass meters (digital HFM 7) with integrated electric throttle valves are used. They are located in the outlet pipe of each turbocharger, bolted to the inlet of the intercooler.
View of the N74 left Turbocharger pressure pipe and HFM