The Nissan Altima 3.5 V6 270hp (2016 - 2018) produces 270bhp and 340Nm in standard form. Our Stage 1 ECU tuning file raises output to 317bhp and 382Nm, a gain of 47bhp and 42Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.