The Porsche Boxster Spyder 3.4i 320hp (2005 - 2011 ( 987 )) produces 320bhp and 360Nm in standard form. Our Stage 1 ECU tuning file raises output to 338bhp and 385Nm, a gain of 18bhp and 25Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.