The Porsche Boxster 3.8i Spyder 375hp (2011 - 2016 ( 981 )) produces 375bhp and 420Nm in standard form. Our Stage 1 ECU tuning file raises output to 395bhp and 440Nm, a gain of 20bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.