The Genesis G90 3.7 T-GDI 370hp (2018 ->) produces 370bhp and 510Nm in standard form. Our Stage 1 ECU tuning file raises output to 400bhp and 610Nm, a gain of 30bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.