The Buick Lesabre 3.8 V6 205hp (1997 - 2005) produces 205bhp and 310Nm in standard form. Our Stage 1 ECU tuning file raises output to 220bhp and 340Nm, a gain of 15bhp and 30Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.