Hummer H3 5.3 V8 300hp ECU Tuning File

The Hummer H3 5.3 V8 300hp (2006 - 2010) produces 300bhp and 430Nm in standard form. Our Stage 1 ECU tuning file raises output to 320bhp and 450Nm, a gain of 20bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.