Features: Make your vehicle sound like a turbo vehicle. After installing this turbo sound whistle, the pressure blowing from the exhaust will make your vehicle sound like a turbo vehicle with turbo system or blow off valve. Premium quality Made of high quality aluminum, lightweight and durable. Easy InstallationEasy installation on the car exhaust pipe. This whistle can be installed in 2 minutes Universal use M size, widely used on all vehicle models. Fit 32mm-85mm outlet pipe. Note: The turbo sound whistle is not suitable for extremely curved rear pipes. Please make sure the exhaust pipe is large and long enough to accommodate this turbo sound whistle. Specification: Type: Car Turbo Sound Whistle Material: Aluminum + Iron Quantity: 1pc Item Color: Red, Blue, Gold, Silver, Black. Size S is suitable for displacement 1.0-1.6, exhaust pipe diameter 32-43mm M size is suitable for displacement 1.6-2.0, exhaust pipe diameter is 37-48mm X size is suitable for displacement 2.0-2.4, exhaust pipe diameter 44-55mm XL size is suitable for displacement above 2.4, Exhaust pipe diameter 56-85mm Installation: 1. Loosen the turbo sound2 whistle screw. Place the whistle body inside the exhaust muffler with the larger hole facing the inside of the muffler3. Screw in the screws in the turbo sound whistle to tighten the item so it won't fall off while driving4. Professional installation is always recommended, products damaged during self-installation will not be refunded. Note There may be slightly color distortion due to different computer resolutions. There may be slight errors due to different manual measurement.