If you asked anyone who’s driven one to describe the 997 GT2 you might get a few sentences full of four-letter expletives that we can’t repeat here. But what we can do is tell you that what they really meant to say is that the GT2 difficult to describe without your heart rate rising. Most of the excitement about the GT2 stems from the fact that its 530 horsepower twin-turbocharged motor delivers its explosive power only to the rear wheels, making every push of the gas pedal an exhilarating experience in many ways. For those GT2 owners who think that 530 just isn’t enough, GIAC offers their performance software to push that number closer to the 600 marks. Along with gobs of additional power and torque, GIAC’s software also provides a greatly improved boost response so that power gets delivered smoother and faster. It also dramatically improves throttle response by reprogramming parameters of the GT2’s drive-by-wire accelerator.