The BMW 6 Series M6 5.0 V10 - 507hp (E63 - 2004 - 2010) produces 507bhp and 537Nm in standard form. Our Stage 1 ECU tuning file raises output to 530bhp and 560Nm, a gain of 23bhp and 23Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.