The Pontiac G8 3.6 V6 256hp (2008 - 2010) produces 256bhp and 336Nm in standard form. Our Stage 1 ECU tuning file raises output to 275bhp and 360Nm, a gain of 19bhp and 24Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.