The BMW 4 Series M4 GTS 500hp (F32/33 - 2013 - 2016) produces 500bhp and 600Nm in standard form. Our Stage 1 ECU tuning file raises output to 530bhp and 700Nm, a gain of 30bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.