The Jac T6 2.0 TDI 139hp (2015 ->) produces 139bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 170bhp and 370Nm, a gain of 31bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.