The Chevrolet Lacetti 2.0 VCDI 121hp (2005 - 2010) produces 121bhp and 280Nm in standard form. Our Stage 1 ECU tuning file raises output to 155bhp and 330Nm, a gain of 34bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.