When I first got my '16 F-150, it was so new that when I ordered the lift kit no one had a coil over for it yet, but the guys at the shop told me I could always upgrade later. I had a Fab Fours bumper and a winch installed, which was much heavier than the stock bumper. I didn't know it at the time, but the front end was sagging a little due to the extra weight and the suspension was maxed out. After the inner treads started wearing more than the outside, I took it in to the shop and they told me it was too heavy and it was time to install the coil overs, which i did. however, it did cost me more to add the coil overs later than if I could have had them installed when I originally had the lift kit put on. So, if you are planning to add a heavy duty bumper and winch in the future, I would highly recommend that you go ahead now and do the coil over.