Using your Tomioka TD05 - 20G Turbocharger is a breeze. First, make sure you have all the parts from the kit, including the turbocharger, actuator, oil pipe, water pipe, gaskets, and hardware kits. Then, you can directly bolt it onto your Subaru WRX (2002 - 2007) or STI (2004 - 2021) as it comes with all the necessary fittings and gaskets.
When it comes to usage, keep in mind that this turbo can reach up to 400WHP, so drive it with care, especially on the track. Don't push it too hard right after installation; let it run for a while to get used to your car's system.
For maintenance, regularly check the oil and water pipes to make sure there are no leaks. Also, keep an eye on the actuator and gaskets. If you notice any strange noises or a decrease in performance, it's a good idea to have it checked by a professional. And remember, don't forget to follow the recommended service intervals for your Subaru to keep the turbo running smoothly.