The BMW 4 Series GC 418D 136hp (F36 - 2014 - 2016) produces 136bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 180bhp and 400Nm, a gain of 44bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.