The Cadillac CTS 3.6 V6 325hp (2014 ->) produces 325bhp and 373Nm in standard form. Our Stage 1 ECU tuning file raises output to 347bhp and 399Nm, a gain of 22bhp and 26Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.