Exhaust Emissions System - Catalytic Converters: Description
NOTE:
The Turbo Carrera uses a thermal reactor instead of a catalytic converter. No additional information on this unit is available at time of this publication.
A catalytic converter is used on all Porsche models (except Turbo Carrera) to aid in reduction of emissions. Installed ahead of muffler, the converter changes CO and HC emissions into water vapor and carbon dioxide.
Located in front of the catalytic converter is a connecting tube which leads to the EGR valve. This tube picks up exhaust gas for recycling. Also on the front part of the converter is another connection. This is the connecting point for the exhaust gas analyzer used during tune-up and during catalytic converter testing.