The bilsteins are awesome. I put the front on first thinking that if i just got rid of the rake id be happy, but as soon as i did and got back home i ordered the back. Compressing the front springs to acheive the lift makes it stiffer, but to me in a good way, being higher needs stiffer. The oem shocks are soft even with a load. I had to have the rear to match. With all four you will have the same handling in all four corners, I also added a top gunz customs one inch block per say to the back, to raise the back end. I sit now about 3/4 inch higher in the rear, I want that look and for loads. I installed mine at 2.8 because thats where dodge puts theres at. And the bilsteins are part of a mopar lift, besides having the mopar sticker its the same. AND about warranty how can they tell if its the same parts plus look on ebay a dodge dealer sells them and from the picture they do not have the sticker. If you look on mopar they offer a 2 inch lift without the front axledrop bracket. I think i covered it all.