The Volkswagen Polo 1.6i 16v GTI 125hp (1999 - 2001 ( 6N2 )) produces 125bhp and 152Nm in standard form. Our Stage 1 ECU tuning file raises output to 138bhp and 170Nm, a gain of 13bhp and 18Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.