The Seat Leon 1.2 TSI 85hp (5F MK1 - 2012 - 2017) produces 85bhp and 160Nm in standard form. Our Stage 1 ECU tuning file raises output to 140bhp and 235Nm, a gain of 55bhp and 75Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.