Using the Injen Intercooler Pipe Kit is straightforward. First, make sure your vehicle is turned off and cooled down. Remove the old intercooler pipes carefully. Then, install the new Injen pipes in their place, using the provided Automotive Grade Silicone Couplers and Stainless Steel Band Clamps. Ensure a tight fit to prevent any air leaks. As for maintenance, regularly check the clamps to make sure they are tight. Inspect the silicone couplers for any signs of wear or damage. If you notice any issues, replace the parts promptly. Remember to follow all safety precautions when working on your vehicle. This will help keep your Injen intercooler pipes in top - notch condition and ensure optimal performance for your Ford Focus ST.