Using these Kryptonite Death Grip Tie Rods is straightforward. They are designed to fit specific heavy - duty trucks, so just match your vehicle's make, model, and year with the provided compatibility list. For installation, click on the 'Installation' link. Maintenance is key to keeping these tie rods in top shape. They come pre - greased with Chevron's ultra - duty EP2 grease. At each oil change, make sure to service them with the same grease. This will keep the moving parts lubricated and prevent premature wear. If you want to upgrade, you can easily switch to the Kryptonite Complete SS Series Center Link Package. Remember, these tie rods come with a lifetime warranty, but you must buy from an authorized dealer and register your purchase within 90 days. And note that the warranty does not cover Heim Joints.