Ruggie,
I don't know what your application is, but this is only a puller fan. Are you planning to replace the stock fan, or are you installing in front of the radiator in which case, you need a pusher fan. Is this for a stock 16" radiator? I would call PWR, they do a SPAL fan, 3000cfm which is much better. A pusher fan will certainly help with cooling but it all depends on what your setup is, including if you have PS or AC. Do your research before spending the $$$'s. Also, check the dimensions to ensure it will fit.
I have been through this pain, so I can speak first hand.