Using the Blouch 20G-XT turbocharger in your Subaru is straightforward. First, make sure your vehicle is turned off and cooled down. Then, install the turbo using the provided steel oil drain tube, coolant lines, turbo mounting gaskets, and adjustable upgrade actuator. It's a bolt-on package, so it should fit easily. When starting your vehicle after installation, let it idle for a few minutes to allow the oil to circulate properly. As for maintenance, regularly check the oil level to ensure the turbo is well-lubricated. Also, keep an eye on the coolant levels to prevent overheating. If you notice any strange noises or a drop in performance, have the turbo inspected by a professional. With proper use and maintenance, your Blouch 20G-XT turbocharger will keep your Subaru running at its best.