The JK family uses 22 different factory coil springs, each with a slightly different rate, dictated by how the JK is equipped. New Black Diamond front / rear coils provide the lift. The largest jump in spring rate is from the 2 to 4-door model so we offer a heavier rated rear spring for the 4-door. Lift height can vary slightly (up to 3/8") depending on your factory spring rate. You can use rear 4-door coils on your 2-door to offset extra weigh
Comments: Took for ever to put on, but worth it. I ended up getting 5 inches out of a 3 inch lift. The instructions were o.k. they could have told you things like disconnect the driveshaft and things will go much easier when doing the front.
Comments: Was able to install kit by myself with limited tools. Recommend strut spring compressor to help install new springs. Rides better than stock. Great control, not harsh at all. On disappointment was that instructions are just OK, not great. Better to look at similar installs on-line to get a feel for what you're doing.
Comments: Absolutely love the lift. For the money and the quality, I dont think there is a better one on the market. Took an afternoon to install with help from a friend and that was reading the instructions step by step.