Using these H&R sport lowering springs is easy. First, make sure your car is on a flat and stable surface. Then, carefully remove the existing springs and install these new ones. Remember, they won't work on GT models, so double - check your car's model. For maintenance, keep the springs clean. You can wash them with mild soap and water during regular car washes. Also, inspect them periodically for any signs of damage or wear. With the limited lifetime manufacturer warranty, if you notice any issues, don't hesitate to contact the manufacturer.