I took out a zone 1.5 and put in the PA 3" . The three was actually easier to install. Less drilling , steering spacer that the 1.5 didn't have is a piece of cake just take time . Rear bumper is also a little easier and stouter brackets than the 1.5. Well worth going straight to a 3" . I was able to lower the Bilsteins back to 1.4 so the shock absorbers actually absorb even the smaller bumps instead of transmitting them. Gave my SB RC a little rake but it was worth it for the improved ride. With E rated 12.50-35-20s I need a little softer suspension to compensate till I decide on what 17" I want . Looks like a 4x4 now