Make your vehicle sounds like a turbo vehicle with this turbo sound whistle. Made of high quality aluminum, it is lightweight and durable. Easy to install on the car's tailpipe. The pressure blowing out of your exhaust will make your vehicle sounds like a turbo vehicle with the turbo system or blow off valve. Specifications: Material: Aluminum alloy, Color: As shown, Size: S. Installation: Loosen the screw on the turbo sound whistle, place the turbo sound whistle body inside the exhaust muffler, and screw the screws to tighten. Note: Not suitable for extremely curved tail pipes. Please allow 1-3mm error due to manual measurement.