The Peugeot 308 GTI 1.6 e-THP 263hp (2017 - 2020) produces 263bhp and 340Nm in standard form. Our Stage 1 ECU tuning file raises output to 295bhp and 380Nm, a gain of 32bhp and 40Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.