I fitted this to my 2007 JK 2 door. I've never dealt with suspensions or elevators, but I can say that the installation was easy. I recommend watching tutorial videos on YouTube. Written instructions are too general. It took me and a man about 5 hours to install. About a month later I ordered Teraflex FlexArm lower arms to hold the caster in place. The tuner recommended a set of screws for the rollers, but I didn't like that solution. I don't remember the actual numbers, but after climbing you can only get about 3.5 lag when it should be about 6. Caster could not be corrected enough and the Jeep felt like it was floating at freeway speeds. You may not notice or care. It wasn't dangerous, I just didn't like the way it was driven. It's definitely a tougher ride than the series, but not in a bad way. It's just different. I'm sure I'll be happy with stiffer springs once I have the rear bumper/tire carrier installed. I've ridden it on rocks a few times and am happy with the overall performance. I think this is the best there is for the price.
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