Porsche 911 GT3 RS User Handbook Manual page 28

The new 911 GT3 RS and the 911 GT3 |
Intake manifold.
The 911 GT3 models are equipped
with a variable intake manifold
with two resonance valves – and
larger intake pipes in the new
911 GT3 RS. The intake manifold
works in conjunction with the
sport exhaust system, featuring
two central tailpipes, to achieve
optimum cylinder charging and
throughput rates.
Drive
In addition to a conventional distri-
butor pipe, the 911 GT3 and the
new 911 GT3 RS have two reso-
nance pipes with resonance
valves. At low engine speeds both
resonance valves are closed.
At medium rpm, the first, smaller
valve opens. At high rpm, both
valves open. The system uses the
vibrations in the air caused by the
movement of the engine valves to
force air into the cylinders.
The result: higher levels of power
and torque over a wider engine
speed range.
Sport exhaust system.
The lightweight sport exhaust
system in the 911 GT3 models
consists of two front silencers,
two catalytic converters and one
rear silencer. The exhaust on the
911 GT3 intake manifold