The Subaru WRX 2.5T 275hp (2018 - 2020) produces 275bhp and 350Nm in standard form. Our Stage 1 ECU tuning file raises output to 330bhp and 400Nm, a gain of 55bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.