Porsche Cayenne Turbo ECU Tune Beats All Others VRTuned.com June 20, 2014 Company News Not many companies are flashing via the OBDII port like VR Tuned, but one of the more rare Porsche vehicles to flash is the SDI4 ECU found in the Porsche 957 Cayenne. This particular Cayenne Turbo 4.8L DFI...