Frequently Asked Questions What is Multi-Stage Induction?
Multi-stage induction enhances engine performance by changing the length of the intake manifold according to engine RPM. The system utilizes two intake manifold pipes per cylinder, one operating at low RPM and the other operating at high RPM. When the engine is operating a lower RPM, air enters the combustion chamber through the longer curved manifold pipe. The length of the pipe is designed to improve combustion and boost low end torque. As the RPM increases past a threshold, the valve on the direct intake pipe opens, letting air enter directly into the combustion chamber through the short, straight in take pipes. The engine will receive a greater volume of air thus improving the high speed power output. This system is standard on the DF175, 225 and 250.