The Porsche Boxster S 3.4i 310hp (2005 - 2011 ( 987 )) produces 310bhp and 360Nm in standard form. Our Stage 1 ECU tuning file raises output to 337bhp and 380Nm, a gain of 27bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.