The Buick Lacrosse 3.6 V6 240hp (2005 - 2009) produces 240bhp and 311Nm in standard form. Our Stage 1 ECU tuning file raises output to 262bhp and 339Nm, a gain of 22bhp and 28Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.