The Hummer H2 6.2 V8 393hp (2008 - 2009) produces 393bhp and 574Nm in standard form. Our Stage 1 ECU tuning file raises output to 415bhp and 600Nm, a gain of 22bhp and 26Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.