...
Someone said earlier that the Mark VIII fan pulls more than a stock clutch fan. I suppose that's possible, but I really doubt it without seeing the numbers. 4k CFM, which I think is a high estimate, might be enough airflow to get the job done, but I'll bet the stock fan still pulls more. I could open the door, reach under my car, and feel the airflow from the stock fan when I revved. Stock fan moves some SERIOUS air. So, I'm skeptical that's only the proclaims 3k CFM or that an electric fan actually moves 4k. I've heard these numbers for a long time, but I don't put a ton of faith into them, even though I know both approaches get the job done.