The Porsche Panamera 4.0T GTS 480hp (971 - 2020 ->) produces 480bhp and 620Nm in standard form. Our Stage 1 ECU tuning file raises output to 620bhp and 880Nm, a gain of 140bhp and 260Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.