The Audi RS4 2.7 V6 Biturbo 380hp (B5 upto 2001) produces 380bhp and 440Nm in standard form. Our Stage 1 ECU tuning file raises output to 430bhp and 570Nm, a gain of 50bhp and 130Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.