Using the StopTech brake kit for your 2008 Subaru WRX is quite straightforward. First, make sure your vehicle is safely parked on a flat surface. You can then remove the old brake components and replace them with the parts from this kit one by one. When installing the brake pads, ensure they fit snugly. As for the stainless - steel brake lines, connect them carefully to avoid any leaks. Remember, this kit is mainly for performance street driving and light - duty track use. Don't use it for heavy - duty racing as it may cause premature wear. To maintain your brake kit, regularly check the brake pads for wear. If you notice excessive dust on your wheels, clean them. Also, inspect the brake lines for any signs of damage or leaks. If you find any issues, replace the parts immediately to ensure your safety on the road.