You will better off using the 4x4 fenders as the 4x4 bumper is wider & will not line up! Also if you are going to static drop or bag your truck you will need to do this !!
I have a 4x4 lower valance on my truck had to squeeze it a tad to line the bolt holes up on each side the other to remaining two holes I used stainless steel screws fits pretty good it's a lot taller than the 2 wheel drive one
yeah it will. I had 2wd fenders with a 4runner bumper. I added a few washers to the lower fender to bumper mount to flair out the bottom of the fender to get it closer to the bumper edge. it didnt look that bad, but I am now putting 4wd fenders on.