Possibly...but relax. Unlikely this modification would get to the stage of causing a power restriction...Yep had the letter also today, I had the initial one done without question but this time around I’m going write to Porsche HQ and ask for some info on how much this effects the air through-put, ie cross sectional area is reduced. There has to be a point where the more restrictions they add to the inlets will effect power and fuel, the fuel I’m not concerned over but it can’t be great for the engine. Would like to know theyv done their due diligence and carried out Dino testing on before and after….🤔 me thinks probably not, but when you start restric airflow it will make a difference maybe only small but it one reason we buy these cars.
The size area of grille would have to be seriously reduced.
Remember you have a variable restriction all the time. Called the throttle body!
(I guess its about 60-65mm diameter when fully open.)
And it has the butterfly flap inside.
It's works as a restrictor as you drive, and you are changing the butterfly flap position and the airflow with your foot on the throttle.
Even with a fully open throttle, The air intake, airbox and air filter is sized to be able to supply way over what the engine demands at max rpm.
They have to also size it large enough to allow for a really dirty air filter that's gone past it's normal service interval.