The Audi TT 1.8T 20V 163hp (1998 - 2006 ( 8N )) produces 163bhp and 225Nm in standard form. Our Stage 1 ECU tuning file raises output to 220bhp and 335Nm, a gain of 57bhp and 110Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.