Thanks for the replies . . . my truck is all stock, Quad Cab, shortbox, 6spd manual. I have 73k miles on it now (I bought it new) . . . I have added fuel pressure gauge, changed to the FAST replacement lift pump and replaced the injector pump already . . . just did a 1600mile trip towing my travel trailer across the Canadian Rocky mountains . . .for most part I am pleased how it tows . . .just would be nice to have a bit more "oomph" on the hills, or if need to pass. . .