Using the Tomioka TD05 - 20G turbocharger is quite straightforward. First, make sure your Subaru (WRX 2002 - 2007 or STI 2004 - 2021) is turned off and cooled down. Then, use the included gasket and hardware kit to install the turbocharger. The standard Subaru 5 - bolts flange type ensures an easy bolt - on installation. When it comes to tuning, it's best to work with a professional to get the right settings for fast spooling, similar to a factory turbo. For maintenance, regularly check the dual ceramic ball bearings and billet compressor wheel for any signs of wear. Keep the turbo clean to ensure optimal airflow. Also, pay attention to the actuator pressure. If you choose the optional 1.3 bar actuator, make sure it's compatible with your vehicle's engine setup. Always follow the manufacturer's recommendations for oil changes as proper lubrication is crucial for the turbo's performance and longevity.