Every NASCAR team from top to bottom of the field use a single SPAL 16" pull fan. If there was anything better, they'd use it. When you're drafting at 190 mph inches apart at Talladega, there isn't much airflow through the radiator, and you need all the help they can get. Call C&R Racing 317-293-4100 and order P/N IX-30102036.
www.crracing.com