Our Timbren SES kits are designed to work on vehicles with factory ride height, allowing for a 1 inch space between the Aeon® rubber spring and your vehicle’s suspension when unloaded. But if you have a leveling kit, body lift, or full suspension lift, the increased distance can limit the performance of our SES kits. However, you can still enjoy a level, controlled towing experience with your lifted truck . How? Our Timbren SES spacer kits reduce the gap between the Aeon® rubber spring of our SES kit and the increased distance between your lifted pickup’s frame and rear axle — enabling your Timbren SES kit to perform properly. Each spacer kit comes with two 1 inch and two ½ inch spacers, along with necessary hardware — so you can mix and match the spacers to achieve desired height.