Using this power package is quite straightforward. First, make sure your vehicle is a 2015 - 2018 Subaru STI. Then, follow the included instructions to install each component in the package. The Accessport V3 can be easily mounted in your vehicle, and you can customize the multi - gauge display according to your needs. When it comes to the intake system and other parts, ensure a proper fit. Remember, tuning is required after installation. For maintenance, regularly check the fuel system components for any signs of wear or leakage. Inspect the silicone hoses for cracks and replace them if necessary. Keep the airbox clean to ensure optimal air intake. Also, follow the recommended service intervals for the fuel injectors and other parts. And don't forget to refer to the official website for any product - specific warnings and safety information.