Many motorists try to add something new to the factory design to make the car look cooler and stand out from the crowd. This nozzle is a modified version of the usual whistle. You can also meet the names turbo whistle or resonator. At higher engine speeds, it begins to imitate the whistle of the turbine. However, to maximize the effect, you need to correctly select the whistle itself, they are several types and sizes, depending on the volume of the engine and the diameter of the exhaust pipe.