I do not think there is any way Engineers working in Germany could possibly over cool a car which spends its later life in Central Texas ....When we are sitting in traffic with 100 plus degrees ambiant air temp... on black asphalt radiating infrared back up under the car.... and sometimes with cars which have been changed over to 134a refrigerant.... I say any upgrade on (reserve) cooling capacity for my car is mucho welcomed... I will be looking at doing that the next time I have to address the engine compartment....I have already decided to put a catch can which will allow the radiator to be purged of air bubbles....