The Peugeot 308 GTI 1.6 THP 270hp (2013 - 2017) produces 270bhp and 330Nm in standard form. Our Stage 1 ECU tuning file raises output to 295bhp and 380Nm, a gain of 25bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.