The Buick Lucerne 4.6 V8 275hp (2006 - 2009) produces 275bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 290bhp and 430Nm, 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.