The Seat Leon 1.4i 16v 75hp (1M - 2000 - 2006) produces 75bhp and 128Nm in standard form. Our Stage 1 ECU tuning file raises output to 85bhp and 140Nm, 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.