I did a 250 mile trip with the new fans in place, and so far, the temp gauge did not go past half way, the A/C was definitely better, and it seems like there is more power. (not as big an improvement as lots of stickers or a 7 inch diameter tail pipe though) it seems like I am going 70-85 with about 250 less rpm, and I think I am getting a little better milage ( I need to run about 750 more miles to be sure) I am going to be fixing the mounting brackets that my ex mechanic screwed up and hopefully gain some more effiecency.