rough country used to be 3.5" so idk, I build mine using parts off of eBay, didn't buy the kit from RC. But RC seems to be the most convenient bc you get everything you need in 1 place, shocks and steering stabilizer too, if you choose. I have suspicion that all lift spindles for these trucks regardless of brand all come out of the same factory.

 

rc makes it in 3 now. I wouldn't go eBay for a lift

 

i ran them for years and abused the crap out of them offroad. Still on the truck rolling fine. I compared them with a RC kit I installed on a freinds truck. Looks exactly the same. Both cast with a machined snout.