Feature:1. Made of quality material, which is durable, sturdy and for lomg time use.2. The simple structure is easy to install and remove, convenient and practical.3. Beautiful appearance will make your car or motorcycle more fashionable.4. The whistle is clamped on the exhaust pipe to make a sound through the airflow.5. There are 2 different colors for you to choose, meeting your different need.Specification:Condition: 100% Brand NewItem Type: Turbine WhistleSize: LOptional Color: Blue, GoldMaterial: Aluminum AlloyDiameter: Approx. 3cm/ 1.2inInstallation:1. Loosen the bolts on the turbine.2. Insert turbine whistle into exhaust pipe.3. Tighten the bolts so that they do not fall off during driving.Package List:1 x Turbine Whistle1 x Wrench1 x Screw