catalytic converter PORSCHE 911 GT3 2013 6.G Information Manual

Intake manifold.
In interaction with the sports exhaust
system, the plastic variable intake manifold
helps to ensure efficient gas cycles and
high throughput.
To guarantee high torque and power
across a broad engine speed range,
the conventional distributor pipe in the
new 911 GT3 is supplemented by a
resonance pipe with resonance flap. This is opened or closed depending on
the engine speed. For optimum cylinder
charge.
This results in an impressive torque
curve, a high maximum torque and
ultimate power output across a broad
engine speed range.
Sports exhaust system.
The sports exhaust system of the new
911
GT3 has t wo front silencers, t wo
catalytic converters and one rear silencer,
which discharges into the central twin ­tract
tailpipes. The large volume of the exhaust
system reduces exhaust backpressure and
thus increases power output.
The t wo Lambda sensors of the stereo
Lambda control circuitry regulate the composition of the exhaust gas separately
in each exhaust tract, while another

pair monitors pollutant conversion in the
respective cataly tic converters.
Thrust I 23
For fuel consumption, CO2 emissions and efficiency class, please refer to page 91.