If you have lifted your Jeep Wrangler JK or JKU, or changed tire sizes you may need to limit the up travel of your rear suspension with our bump stop extensions. This extension kit will bolt into place utilizing existing holes in the factory lower bumpstop pad. As a rule of thumb a 2 inch kit is good for 33 inch tires, a 3 inch kit for 35 inch tires, and a 4 inch kit for 37 inch tires, however this can vary depending on the aftermarket components installed on your vehicle. We always recommend flexing your suspension and measuring the length of the extension kit that is right for your Jeep. You will receive 2 bump stop extensions and all of the required installation hardware, the parts will ship bare and will need to be painted or powder coated before installation.