The Seat Leon 1.6i 16v 105hp (1M - 2000 - 2006) produces 105bhp and 148Nm in standard form. Our Stage 1 ECU tuning file raises output to 115bhp and 160Nm, a gain of 10bhp and 12Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.