The Chevrolet Impala 3.9 V6 245hp (2006 - 2014) produces 245bhp and 240Nm in standard form. Our Stage 1 ECU tuning file raises output to 265bhp and 265Nm, a gain of 20bhp and 25Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.