The Citroen Relay 3.0 HDi 157hp (2006 - 2012) produces 157bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 190bhp and 470Nm, a gain of 33bhp and 70Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.