yeah I changed them to KM2's instead of the all-terrain ones. The mud-terrain tires seemed a bit more suited for off-road.
Never ran a BFG, but those look alot better. I've got Nitto mud grapplers on my truck now, but I've had Boggers, super swampers, ground hawgs, mud brutes, pro comps, thornbirds, and mickey thompson mtzs.
As for bumpers, I'm not really sure, I've never changed a bumper to an offroad bumper, although I had some steel squaretube bumpers on an old for once. Could run into trees with those and not hurt the truck. :laugh: Exhausts are another thing I can't help you with really, I know a couple buddies who have straight pipes which are obnoxiously loud. Might try something like flowmaster super 40/44s.