The Mazda 6 2.0 CiTD 140hp (2003 - 2008) produces 140bhp and 330Nm in standard form. Our Stage 1 ECU tuning file raises output to 170bhp and 400Nm, a gain of 30bhp and 70Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.