Using these FactionFab rear brake lines is easy. First, make sure your vehicle is parked on a flat surface and the engine is off. Remove the old factory rubber brake lines carefully. Then, install the new stainless - steel brake lines using the included hardware. Ensure all fittings are tightened properly to avoid any leaks. When it comes to maintenance, regularly check the lines for any signs of damage such as cuts or abrasions. If you notice any issues, replace the lines immediately. Also, keep the lines clean to prevent dirt and debris from causing damage. Avoid using harsh chemicals on the lines as this may damage the outer coating. And remember, always follow proper safety procedures when working on your vehicle's braking system.