The Buick Regal 2.0 Turbo 255hp (2010 ->) produces 255bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 290bhp and 460Nm, a gain of 35bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.