yep 4low but i run in drive then lock it to 4th fronts at 17lbs rears at 50 seems to work great for my truck, oh i run 35 mts also and if your aloud to run bump stops in the rear do so and set them to 1inch movement
void it you wont regret it! until you see what the inside of them pipes and egr look like you will wish you did it sooner! trust psa members they know there ****!
im on that page and your right there are a lot off dumazzs but there are a few good men too, as far as the hazing I had it real bad on h&s box tunes now that im on gearhead files that has long gone no more hazing and the truck runs great