Very good point. In the case of leaving the oem E-Fan in place would show it to act as an air inducer (only while it is in motion..of course ). Original plan of the Kia motor sport engineers <img src="/forums/images/graemlins/smile.gif" alt="" /> However, I agree that the 16" aftermarket fan would certainly be a GREAT benefit and a plus with many self explained benefits. Based on the info presented here I also realize that leaving in the oem a/c fan intact---- will not cause a power loss at all. The downside would just prolly be redundancy and a tad bit more cooling capacity. It certainly would not be causing more harm at all, as someone stated earlier <img src="/forums/images/graemlins/kewl.gif" alt="" />