The Buick Envision 2.0 Turbo 252hp (2018 ->) produces 252bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 280bhp and 450Nm, a gain of 28bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.