Using the Injen intercooler pipe kit is easy. First, make sure your vehicle is turned off and has cooled down. Then, carefully remove the old intercooler pipes. Install the new Injen pipes in their place, using the included Automotive Grade Silicone Couplers and Stainless Steel Band Clamps. Ensure all connections are tight to prevent any air leaks. As for maintenance, regularly check the pipes for any signs of damage or wear. Keep an eye on the silicone couplers and clamps too. If you notice any leaks or issues, it's best to address them right away. Also, make sure to clean the pipes occasionally to keep them in good condition. Remember, this kit is designed for 2013 - 2018 Ford Focus ST models, so don't try to use it on other vehicles.