Fuel system, exhaust system > Heating air supply, exhaust system, emissions
Exhaust system 911 sc (202-00)
Exhaust gas recirculation 911 sc (202-05)
Exhaust system turbo (202-10)
Exhaust system turbo exhaust gas recirculation m930.61/62 (202-15)
Heating air supply see tpi (202-20)
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