If you want lift you will need to either replace the coils or add a spacer as in your leveling kit to your stock coils.
As stated, the 9000XLs are popular among owners that want a softer ride because you can choose one of 9 compression damping setting. However, there are better choices if your are more concerned with performance, particularly those that are specifically tuned for your coils. Since your Jeep is close to stock then even a set of Rubi takeoffs are a good choice for a low price.
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