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Porsche XperTune Performance Handheld Tunner - 911 | 2010-2011 FS-POR-9972GT3-ET 1620607400 Headers are one of thePorsche XperTune Performance Handheld Tunner For Porsche 997. 2 GT3 GT3 RS (2010 2011) Models. Introducing the XperTune Performance Handheld Tuner, the key to unlocking the maximum power potential of your Porsche 997. 2 GT3 3. 8L engine without compromising its smooth drivability or long term reliability. This innovative device offers a convenient alternative to traditional ECU bench flashing methods. The XperTune handheld tuner connects directly to