Recommendations on what upgrades on 05 sti engine to withstand pt6466 turbo

Hello, The shortblock may not require anything. The ej is a tough block. The crank should already be forged, and the rods strong too. If you change pistons, hypereutectic pistons will sustain heavy abuse, but they won't rattle when it' cold like forged pistons. Look around for boring. People have built these so often they know what it can take at what bore depth. Fuel system. You will have to flash the ECM as well. Bigger fuel pump, bigger injectors. Match them to the needs of the engine so they aren't over or underkill. Mass airflow sensor maybe. high flow air filter would be needed, too. Reseal the induction system so you don't have leaks right away.