The Cadillac SRX 3.6 V6 255hp (2004 - 2009) produces 255bhp and 344Nm in standard form. Our Stage 1 ECU tuning file raises output to 275bhp and 370Nm, a gain of 20bhp and 26Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.