Intake Air Plenum: Description and Operation

2474 Tuning Flap

The resonance intake system is a two-stage version through the switchable tuning flap between the intake distributors inside the perpendicular resonance pipe. This switchable, two-stage resonance intake system can be used to adjust the air oscillations in the intake system to the respective engine speeds to ensure high torques even at low rpms, an even torque curve and high maximum output. This is achieved by having the tuning flap closed at full throttle between 2,600 rpm and 5,100 rpm, but open at lower and higher rpms.