Features:1. Make your vehicle look like a turbo car2. With this turbo whistle installed, the pressure blowing from the exhaust will make your vehicle look like a turbo car with a turbo system or exhaust valve.3. Made of high quality aluminum, light and durable.4. Easy to install on car exhaust pipe.describe:Material: aluminum alloyColor: Red/Silver/Black/Blue/GoldSize: S/MInstallation method: 1. Loosen the screw on the turbo whistle2. Put the main body of the turbo whistle into the exhaust muffler with the larger opening facing the inside of the muffler3. Tighten the screw on the turbo whistle so that it does not fall off when driving.packing list: 1 * productRemark: 1. The Turbo Sound Whistle is not suitable for extremely curved rear tubes.2. Please make sure your exhaust pipe is big enough and long enough to accommodate this turbo whistle.Features:1. Make your vehicle look like a turbo car2. With this turbo whistle installed, the pressure blowing from the exhaust will make your vehicle look like a turbo car with a turbo system or exhaust valve.3. Made of high quality aluminum, light and durable.4. Easy to install on car exhaust pipe.describe:Material: aluminum alloyColor: Red/Silver/Black/Blue/GoldSize: S/MInstallation method: 1. Loosen the screw on the turbo whistle2. Put the main body of the turbo whistle into the exhaust muffler with the larger opening facing the inside of the muffler3. Tighten the screw on the turbo whistle so that it does not fall off when driving.packing list: 1 * productRemark: 1. The Turbo Sound Whistle is not suitable for extremely curved rear tubes.2. Please make sure your exhaust pipe is big enough and long enough to accommodate this turbo whistle.