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Originally Posted by RenegadeXR
The only real technical detail here is that the flowtie in the blackout is indeed an actual cutout to the radiator to help feed it air. That being said, I sincerely doubt that the CFM of airflow it provides is that large. It probably wouldn't lead to catastrophic failure if they removed it. I'm not saying it doesn't serve a functional purpose, but I think the flowtie is more-so a marketing gimmick.
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The change is enough to shove an additional 3 cubic meters of air through the grille per minute, and that extra air dropped the engine coolant and oil temperature by a full 2 degrees Fahrenheit during track work.
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So 2 degrees during track duty is probably zero in normal driving situations.