So I have a 2016 nissan pro4x. I wanted be able to load more in the rear so I opted on getting a add a leaf and a 2 inch spacer in the front. Well I am having some issues 1. I get that cupping in the front when I go over speed bumps and my rear end when I am at a complete stop when I hit the gas sometimes I get a weird feel as if something is loose somewhere. I have no clue what it is everything is tight. I took it to nissan and they did see that the rear end tilts a little sometimes during take off. I have it scheduled to have it all taken off but I am wondering if there is a better way to go like getting the adjustable bilstein shocks for the front cupping. I am looking for suggestions if any.