POWER UP THE CAR'S ROAR: This is a turbo sound simulator whistle that simulates the turbine's pressure release sound. After installation, your car will sound like a turbo vehicle with the turbo system or blow-off valve. EASY TO INSTALL: It can be installed in 2 minutes. 1. Loosen the screw on the turbo. 2. Insert the sound whistle into the tailpipe. 3. Tighten the screw so it won't fall off while driving. Make your vehicle sound like a turbo vehicle with the turbo system or blow-off valve. LOOK: Beautiful. Spacious. Very stylish and affordable - this is the first choice for decorating your vehicle. Easy to install. Near the exhaust port. Four sizes are available. This exhaust valve is suitable for most vehicles and can be used in cars and motorcycles. It is the ideal accessory for vehicle aftermarket installation. PREMIUM MATERIAL: Car turbo sound whistle made of durable material. Corrosion-resistant and rust-resistant. Long-term use. Easy installation on the car exhaust. Beautiful appearance. Very fashionable. It is the first choice for decorative cars. WARM TIPS: The turbo sound whistle is not suitable for extremely curved tailpipes. For vehicles with small displacement and a large displacement, choose a large one. Because the whistle is caused by the airflow. The displacement is large. The larger the whistle, the easier it is to make a sound.