The Seat Leon 1.9 TDI 110hp (1M - 2000 - 2006) produces 110bhp and 235Nm in standard form. Our Stage 1 ECU tuning file raises output to 140bhp and 295Nm, a gain of 30bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.