Judging from that X-Bow video the sound still makes every car sound like a vacuum cleaner. And no, the X-Bow is turbo, not supercharged. The sound for me was the biggest minus in GT5s curriculum. And I don't get why they couldn't assign some premium cars sound data to lets say all other standard cars with the same displacement, cylinder number and aspiration mode (= all those 2.0 i4 turbos).