If they are off of a Rubicon then don't expect more than an inch. Is your jeep a 4cyl? If it is a I6 then dont expect anything unless your springs are shot. You don't need that much lift to run 33's. 4 inches of lift is plenty. I have about 3 inches of lift in the front and 2 in the rear and i clear 35's. My best advice to you is dont listen to those idiots on jeepforum or jeepsunlimited that tell you you need a certain lift or a certain amount of lift to run a certain tire. More than half of them are web wheelers that are still on BB and just repeat what they have heard from others.