I would like to add from my recent research as far as I can tell, the 5100's are the same as the 4600's except for the Zinc finish along with they also have 3 different height models that can be used on stock/slightly lifted trucks like mine with taller heavy duty camper package front springs (Part Number: 24-186018 Front Lifted Height: 0-2") along with being lifted in the rear 1/2-1" (Part Number: 24-186025 Rear Lifted Height: 0-1") like mine always rides with a little air in the bags, to very lifted trucks with 4" and 6" shocks.
The 5100's on my truck are rated for 0-2" lift front and 0-1" lift rear. This seems perfect for MY setup and quite frankly any stock setup with them stating from 0"? I'm looking forward to putting a bunch of weight on them soon and seeing how they do and hold up. I'll definitely report back good or bad.
Bilstein 5100