The Porsche 911 3.8i Turbo 500hp (2004 - 2011 ( 997 )) produces 500bhp and 650Nm in standard form. Our Stage 1 ECU tuning file raises output to 550bhp and 740Nm, a gain of 50bhp and 90Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.