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Q: I am presently the very proud owner of a 991.1 4GTS coupe with a PDK transmission. My car has a central radiator. However, I noticed that the new 991.2 GTS lacks the central radiator in USA specification.
My first Porsche was a 997.1 2007 C4S with a Tiptronic transmission. That car also had a central radiator. However, I noticed that the central radiator was deleted from the 997.2 generation C4S. I have searched for articles on the subject of Porsche 911 water-cooling and I could not find an answer. Why is it deleted from certain models?
Scott’s answer: “The water-cooled 911 range does vary for central radiator fitment and is purely down to the spec and model. Generally, most PDK and Tiptronic cars do run them but they can vary depending of the specification and model year. When the 991 generation was released, we found they had thermal management systems built in and activating Sport Plus can vary the cooling operating temperatures, so a third radiator would be installed to help manage those temperatures. Most AWD 911s have a central radiator with Sport/sport Plus. The higher performance 911s, like the GT range and Turbos, also run one to aid the cooling system. Country coding also may be a factor due to hotter climates.