The Mazda 3 2.0 CiTD 143hp (2003 - 2009) produces 143bhp and 360Nm in standard form. Our Stage 1 ECU tuning file raises output to 170bhp and 410Nm, a gain of 27bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.