I am planning on installing a cat-back exhaust and also the edge system with the real goal simply to negate the loss of power when the fan kicks in- which is very often when I pull. I want to know what those of you that have this are seeing- does the added power make for blissful towing up and down hills? Mileage? I plan on driving like a grandma but when I'm connected to my trailer, I will continue driving at 60-65 up the hills. I assume that the cooling fan continues to cycle on and off but the added power will overcome its draw- right?

i dont know to much about the fan, but if your tryin to cut back on heat(im guessing you are) it would be best to get a turboback exhaust and eliminate the cat. you'll get much lower EGT's than just the cat-back