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Air-intake system.
All models have a two-stage
resonance intake syste m, which
uses the vibration of the air as
i t passes through the intake
manifold to increase the intake
volume. The system can adjust
to engine sp eed.
Ben efits of this include higher
torque at low engine speeds and
a flatter torque curve.
The entire intake sy stem is made
from lightweight plastic. The
air-filter housing of the 3.8-liter
engine has a variable geometry
that brings added character t o
the engine sound, which
becomes much more
aggressi ve at higher rpm.
911 Carrera S with sport exhaust system
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