The Toyota Tundra 4.6L V8 310hp (2015 - 2020) produces 310bhp and 440Nm in standard form. Our Stage 1 ECU tuning file raises output to 340bhp and 500Nm, a gain of 30bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.