Intake Air System, Described 

The intake air system:

• provides clean air to the throttle body.
• outside air enters the engine intake air resonator and then moves through the opening in the LH front fender apron to the engine air cleaner (ACL).
• the positive crankcase ventilation (PCV) system is supplied clean air from fittings on the air cleaner outlet tube.
• intake air noise is effectively eliminated (and restricted) by means of the sealed and tuned resonator chamber located in the engine intake air resonator.

The air cleaner element (ACL element) is:

• a dry-type air cleaner element.
• a pleated-paper air filtering element which permits airflow through the air induction system, filtering  out unwanted dust, dirt and debris.

The air induction system improves engine performance by using the intake manifold runner control (IMRC) assemblies as follows:

• The intake manifold has two runners per cylinder, feeding each of the intake parts in the cylinder  heads.
• The IMRC assemblies are located between the intake manifold and cylinder heads, providing two air  passages for each cylinder.
• One air passage is always open and the other passage switches from closed to open by means of  a valve plate.
• Below 3000 rpm, this valve plate is closed to improve low-speed and cold engine performance.
• Above 3000 rpm, this valve plate opens to improve high-speed engine performance.