It will sag your front suspension about 1 inch. Your suspension will be fine just lower in front than it already is. I had a teraflex leveling kit installed when I added a warn bumper and winch and lost about 1 inch my front coils were 14s.
I changed them to 18 and it level again. It will depend on what coils spring you have up front. Many guys assume the rubicon has a bigger number spring up front but many don't so you need to look to be sure.
2012 Sport Auto 3.73
ACE rock sliders, Warn M 8000 with synthetic rope
Eaton Trutrac Front and rear
17 inch ATX Ledge wheels on 285/70/17 Duratrac
Cheap is never a good thing when it comes to your Jeep