From the diffuser onward, the flow is directed into the engine's induction system. Which sequence is correct?

• A. Exhaust manifold, then cylinders.
• B. Induction manifold, then inlet ports.
• C. Throttle body, plenum.
• D. Intake filter, then combustion chamber.

Answer: (B)

Air entering from the diffuser must be split and delivered to each cylinder through the induction system. The induction manifold (intake manifold) acts as the central distribution point, collecting the incoming air and routing it into individual runners that feed the inlet ports on each cylinder. From there, the air enters the cylinders for combustion. Upstream parts like the throttle body and plenum regulate and store air before it reaches the manifold, but the essential sequence is induction manifold first, then inlet ports. The other options involve exhaust or don't describe the distribution to the cylinders, so they don’t fit the path of induction air.