Easy installation on my 13 2500 6.0 Silverado Crew. Didn't buy any tools, just used a clamp. Total installation time was around 30-45 minutes on sockets. Tires not removed, plus stopped by to drink beer. 1 ¾ inch lift gained when screws were rotated back into place. You can also tighten the screws an additional 2 inches. The downside is that it hits the frame stops on big bumps or potholes.