Electric fan's are great, but one thing I will tell you is stay away from the Flexalite 5.0 Fan. I used this fan when I had the Stock Rad in my Stang and it was a pos. It fit like crap, and it didn't cool my car any better than the flex fan I had on before it did, and this was with a mild 351W in the car at the time. I believe the Flex A Lite fan is rated to support only 250HP. Yes an electric Fan will increase your HP a bit but not enough to even notice it. But every little bit add's up right. Anyway there is some better fan's out there. I used a SPAL Dual Electric Fan Setup on my Be Cool rad and it cools my 408 very well without a problem.