The Hummer H2 6.0 V8 316hp (2003 - 2007) produces 316bhp and 522Nm in standard form. Our Stage 1 ECU tuning file raises output to 335bhp and 545Nm, a gain of 19bhp and 23Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.