Description: It is a turbo pressure whistle, an aluminum whistle on the exhaust pipe and air through the exhaust pipe to make it sound. Characteristics: Brand new and high quality. Made of aluminum alloy material, lightweight and durable. Universal fitment for all vehicle models. Easy to install, can be installed under 2 minutes. Periodically (after 500-1000 km) check and retighten the bolt and rock nut. After installing this product, the exhaust blow-off pressure will make your vehicle sound like a turbo vehicle with a turbo system or blow-off valve. Specification: Conditions: 100% Brand New Silver color Material: aluminum alloy Usage: General purpose Model: M Size: (whistle caliber): M number 23mm Installation: First, loosen the screw on the Turbo Sound Whistle. Then place the body of the Turbo Sound Whistle inside the exhaust muffler with the larger hole facing the inside of the muffler. Finally, tighten the screws on the Turbo Sound Whistle to tighten the item so it doesn't fall off while driving. (Professional installation is always recommended) Package included: 1 x Turbo Sound Simulator Whistle 1 x Small Wrench 1 x Screw Attention: