The Subaru Tribeca 3.6i 258hp (2008 - 2010) produces 258bhp and 350Nm in standard form. Our Stage 1 ECU tuning file raises output to 275bhp and 370Nm, a gain of 17bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.