Exhaust System -Just as fast as the Nissan Z gulps air, it gets rid of it with equal efficiency through a large-diameter, high-flow exhaust system finished with a high-capacity dual-outlet muffler. It's a unique exhaust system that offers the obvious advantages of dual exhaust, while greatly reducing weight and improving undercarriage aerodynamics. All tuned for a wonderful exhaust note that seems to say goodbye in the ears of the competition.