The Seat Arosa 1.0i 8v 50hp (2001 - 2004) produces 50bhp and 86Nm in standard form. Our Stage 1 ECU tuning file raises output to 56bhp and 96Nm, a gain of 6bhp and 10Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.