The Buick Excelle GT 1.8 ECOTEC 146hp (All) produces 146bhp and 177Nm in standard form. Our Stage 1 ECU tuning file raises output to 156bhp and 192Nm, a gain of 10bhp and 15Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.