The BMW M6 V10 507hp (E63/E64 - 2003 - 2012) produces 507bhp and 520Nm in standard form. Our Stage 1 ECU tuning file raises output to 535bhp and 550Nm, a gain of 28bhp and 30Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.