Intake Manifold: Description and Operation

The intake manifold is made up of the:
- intake surge tank.
- LH and RH intake runners.
- LH and RH air horns.

Runner lengths are tuned to optimize engine torque and horsepower output.

The entire intake manifold system must be removed to allow access to:
- fuel injectors.
- fuel injection supply manifold.

The intake manifold provides mounting flanges for the:
- throttle body.
- EGR valve (EGR valve).
- EGR backpressure transducer.
- Intake Manifold Runner Controls (IMRC).

The unique air intake manifold features the following items:
- an intake surge tank
- LH and RH intake runners. The primary runner is always open. A secondary runner is controlled by an electronically operated Intake Manifold Runner Control (IMRC) deactivation motor and is open at high engine rpm.
- vacuum taps for EGR valve, fuel pressure regulator, evaporative emission canister purge and power brake booster are provided on the intake surge tank.