The Seat Leon 1.9 TDI 150hp (1M - 2000 - 2006) produces 150bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 190bhp and 410Nm, a gain of 40bhp and 90Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.