The Kia Optima 1.7 CRDi 136hp (2012 - 2015) produces 136bhp and 325Nm in standard form. Our Stage 1 ECU tuning file raises output to 160bhp and 380Nm, a gain of 24bhp and 55Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.