Porsche 981 Cayman GT4 ECU Tuned VRTuned.com April 25, 2016 Media & Events, Product Info, Tuning Tech The Porsche 981 Cayman GT4 is a animal that only gets better with performance parts and a ECU Tune. VR Tuned is able to flash the new SDI9 Cayman GT4 3.8L via the OBDII port to allow customers worldwide to...