VRIS (Variable Resonance Induction System)
At the back of the intake manifold is two valves controlling two metal plates inside the intake manifold. When the valves open, a vacuum pulls the actuator open wich in turn opens the metal plates. These plates are set to open and close at the following engine rpm.
Engine Speed (RPM)| VRIS Plate 1| VRIS Plate 2
VRIS 1
VRIS2
VRIS Actuators
