The Buick Lacrosse 3.8 V6 200hp (2005 - 2009) produces 200bhp and 312Nm in standard form. Our Stage 1 ECU tuning file raises output to 219bhp and 337Nm, a gain of 19bhp and 25Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.