The Buick Lacrosse 3.6 V6 310hp (2017 ->) produces 310bhp and 363Nm in standard form. Our Stage 1 ECU tuning file raises output to 330bhp and 389Nm, a gain of 20bhp and 26Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.