2012 911 Section 2-2 11/3/11 10:15 AM Page 40
911 Carrera 911 Carrera S
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All exhaust system variants feature flow-optimized exhaust manifolds with catalytic converters arranged close to the engine (see Fig. 2_457_11, 1) as well as a common front muffler (see Fig. 2_456_11, 2) and one main muffler (3) per cylinder bank with corrugated tube (4).
2_457_11
2_456_11
The purpose of the corrugated tube on the main muffler is to improve vibration comfort during idling.
The specifications for the exhaust systems are described on the following pages. The following are installed worldwide for all engines: 2_458_11
• Identical flow-optimized exhaust manifold/catalytic converter modules • 5 different front mufflers • 3 different main mufflers • 3 different tailpipe covers
! Caution when handling: Do not pick up the main muffler by the short tube end! Risk of deforming the corrugated tube (4).
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DME engine electronics
2.10 Exhaust system, emission control
