The Ferrari 355 GTS/GTB/Spider 3.5 V8 380hp (All) produces 380bhp and 360Nm in standard form. Our Stage 1 ECU tuning file raises output to 400bhp and 388Nm, a gain of 20bhp and 28Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.