The Seat Leon 1.4 TSI 140hp (CHPA) (5F MK1 - 2012 - 2017) produces 140bhp and 250Nm in standard form. Our Stage 1 ECU tuning file raises output to 170bhp and 300Nm, a gain of 30bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.