The Citroen DS4 1.6 e-HDi 8V 115hp (2011 - 2015) produces 115bhp and 270Nm in standard form. Our Stage 1 ECU tuning file raises output to 140bhp and 320Nm, a gain of 25bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.