Yeah, That'd be ok. try to position the ESC so the fan is blowing air between the fins. I have the 13.5ss pro in my truck. A friend broke three blades on his fan in stock truck. I decided to take my fan off and use it when I got to mod buggy. But still don't use it there. The esc in my truck usually temps at 115-120 degrees when I temp it. The GTB is very tough and in the 104 degree building it never thermalled on me. But the fan will be extra insurance.