Using the Forced Performance HTZ Blue Turbocharger is straightforward. First, make sure to install it according to your Subaru WRX or STI's specifications. If you choose the 84MM cover, you'll need to perform a TGV delete for it to fit properly. When it comes to the actuator, you can use the stock 15 PSI actuator or upgrade to the 18 PSI TiAL MVI actuator, but remember the MVI isn't available with the 84MM cover. For maintenance, regularly check the oil supply line to ensure proper lubrication. Since the turbocharger is custom - built, it might take some time to arrive, so be patient. And always keep in mind that the build time depends on the model and options you select, so there's no set delivery date.