Using your Tomioka TD06 - 20G Twin Scroll Turbo is straightforward. First, make sure to carefully follow the installation instructions that come with the kit. It's 100% bolt - on, so it should fit nicely into your 2002 - 2007 Subaru WRX or 2004+ STI. When starting your engine for the first time after installation, let it idle for a few minutes to allow the oil to circulate properly. As you drive, you'll notice a significant improvement in power and performance. Remember, this turbo can support up to 550HP, so drive safely and within your limits. For maintenance, regularly check the oil and water pipes for any leaks or damage. Also, inspect the gaskets and hardware kits to ensure they're tight and in good condition. If you notice any strange noises or a decrease in performance, it's a good idea to have your turbo checked by a professional.