Exhaust System
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
| Designation | 997 | 997 S |
|---|---|---|
| Exhaust system structure | Twin-branch exhaust system with catalytic converters arranged close to engine, one front and one rear silencer per cylinder bank | |
| Euro 2 | Oxygen sensor closed-loop control with two continuous pre-catalytic converter probes, 3-way catalytic converter system with two catalytic converters left + right and two post-catalytic converter probes | |
| Euro 4 | Oxygen sensor closed-loop control with two continuous pre-catalytic converter probes, 3-way catalytic converter system with two catalytic converters left + right and two post-catalytic converter probes | |
| USA LEV II | Oxygen sensor closed-loop control with two continuous pre-catalytic converter probes, 3-way catalytic converter system with two catalytic converters left + right and two post-catalytic converter probes | |