I had those fans running on a big block car, they didn't move enough air for my car. I have a/c and an automatic trans, I overheated in my driveway coming home from work one day. I moved up to spal fans, but I haven't run the car in hot weather yet. I can say the spal fans move considerably more air than the champion fans did. Had I known before I would have gotten the shroud and sourced my own fans.