I'm sure some people on here run them. I want to know which ones are better or if you have recommendations on which to get. Also, what is the CFM of the stock rad fan and a/c fan in a civic. I want to replace both of mine for something smaller.

here is one


then there is this one that has a curved blade

 

the stock fan works just fine.
here in WA is always cold.

 

well i want to run a thicker core rad