My two 10" fans have what Griffin calls a true CFM rating of 898 per fan. So we are at about 1800CFM and the radiator has two 1" cooling tubes. The shroud is custom fit to the radiator with 8 rubber flaps which are forced open as the car gains speed. As stated earlier. I have not driven the car yet. Just talking about idling right now. I seem to be hearing that 210 is not really all that hot for this build? That is good news, and I will post what happens down the road when I take her up the highway.