Using this turbocharger is quite straightforward. First, make sure to install it according to the vehicle's manual and with the included gasket set. The turbo comes with an oil return flange and - 4 water fittings, which you can use to create your custom water feed and return lines. However, remember that the oil line is not included, so you'll need to get one separately. When it comes to using it in your Subaru WRX or STI, it's designed to provide massive power, but be aware that if you're doing road racing or autocross where oil flow might be low, the Xona Ball Bearing CHRA gives it better durability. Regarding maintenance, regularly check the oil levels and the condition of the turbo components. If you choose the ceramic coating option from Tirado Custom Coatings, follow their specific maintenance advice. Keep in mind that the 84MM FAP Cover requires a TGV Delete to fit properly in the stock location. Also, since these turbochargers are built to order, the build time can vary, and we can't promise a specific delivery date, so plan your installation accordingly. And if you buy a Subaru turbo with an internal wastegate, it comes with a 1 bar actuator.