The Seat Leon 1.0 TSI 90hp (KL - 2020 ->) produces 90bhp and 160Nm in standard form. Our Stage 1 ECU tuning file raises output to 130bhp and 240Nm, a gain of 40bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.