Using this coilover kit is straightforward. First, make sure your 2005 - 2007 Subaru STI is on a flat and stable surface. Follow the installation guide provided carefully during installation. When adjusting the dampers, you can use the 24 - step adjustability to suit your driving needs. For everyday driving, you might want a softer setting for a more comfortable ride. For track use, a stiffer setting can give you better control. As for maintenance, regularly check the lower mount locking ring clamps to ensure they're tight. Also, inspect the shocks for any signs of oil leakage. Keep the kit clean to prevent dirt and debris from affecting its performance. If you plan to upgrade to a 2 - Way or 3 - Way Canister, refer to the modular upgrade instructions. Remember, this kit comes with a 5 - year limited warranty, so if you have any major issues, contact the manufacturer.