The Mazda 6 2.0 CiTD 136hp (2003 - 2008) produces 136bhp and 310Nm in standard form. Our Stage 1 ECU tuning file raises output to 170bhp and 370Nm, a gain of 34bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.