The one I got from dealership had the larger ujoints installed already. Just had to get the old one out. Slide one end in the back of transfer case and 4 bolts that go to the rear end. Total swap time took 30 minutes. All vibration and noises are gone! Very happy with this mod.
Won't let me pm gotta have 10 posts lol, but it took about a week maybe a week and a half, and yes the u-joints were beefier, from what I could tell, than the old 2 pc was