The Porsche Boxster GTS 3.4i 330hp (2011 - 2016 ( 981 )) produces 330bhp and 360Nm in standard form. Our Stage 1 ECU tuning file raises output to 350bhp and 400Nm, a gain of 20bhp and 40Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.