The Mazda 3 2.0 SkyActiv-G 165hp (2013 - 2015) produces 165bhp and 210Nm in standard form. Our Stage 1 ECU tuning file raises output to 175bhp and 220Nm, a gain of 10bhp and 10Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.