HELIRN74 I just leveled everything. No lift on the rear. The control arms are only so I don't bottom out on the droopstops and get that annoying bang from that. I used Full Throttle control arms on my 2012 2500, but this time I was determined I wasn't buying anything but Cognito. Basically, I needed arms to get what I wanted, and I wanted to see why the big hype about Cognito arms. They are nice arms, and look great!! The ride is better than my 2012, but I don't know if it is from the control arms, or just the difference in trucks. That was an extended cab, I had nitto tires, and this is just anicer truck I think too.