Using your Boost Lab TD06SL2 - 54X Turbocharger is straightforward. First, make sure your 2015 - 2021 Subaru WRX has the FA20 engine as this turbo is specifically designed for it. When installing, use the included gaskets, downpipe studs, and nuts to ensure a proper fit. Once installed, you're ready to experience the power. Remember, for the best throttle response and power, let the engine warm up a bit before pushing it hard. As for maintenance, regularly check the turbo for any signs of damage or leaks. Keep an eye on the oil levels as the turbo relies on proper lubrication. If you notice any strange noises or a drop in performance, it's a good idea to have it checked by a professional. With proper use and care, your turbocharger will serve you well for a long time.