Put this on my 2013 2500hd 4x4 6.0 with 295/70r18s on the stock wheels and 9 turns on the stock t-bars to compensate for my truck having bumps and not being fun to drive . I was looking for bumps which caused the steering wheel to be pulled out of my hands and now I couldn't understand where they were! I love my truck again. Took 10 minutes with hand tools and class 8 3" x 0.5" threads. The included boot is flimsy, but I put it on with the flimsy zip that came with it.