If you've added more weight to your JK with bumpers, winches, a tire carrier, etc. you may find you could use a little extra boost in the front or rear. These rear coil spring spacers are designed to give you that extra boost on a budget. They are easy to install and will maintain your factory ride. These JK-specific coil spacers can be used to gain 1.75" of lift when installed with the factory spring isolator or approximately 1" of lift when installed with the factory isolator removed.