Using your Injen cold air intake is easy. Just install it according to the provided instructions in your Kia Stinger 2.5L Turbo L4. Once it's installed, you can immediately enjoy the improved performance and the cool intake growl. When it comes to maintenance, check the air filter regularly. If it gets dirty, clean or replace it as needed. Also, inspect the intake tube for any signs of damage or leaks. And make sure to keep the area around the intake clean. Remember, don't use any harsh chemicals on the intake components as this could damage them. If you have any questions, feel free to reach out to our support team.