describe: Vehicle sounds like a turbocharged car: With this turbine sound whistle installed, the pressure coming out of the exhaust pipe will make your vehicle sound like a turbocharged car with a turbo system or exhaust valve. HIGH QUALITY: Made of high quality aluminum, lightweight and durable. Easy to install: Easy to install on car exhaust pipe. The whistle installs in 2 minutes and comes in a universal M size, making it widely suitable for all models. Fits 37mm-48mm exhaust pipes. NOTE: Turbo whistles are not suitable for extremely curved exhaust pipes. Make sure the exhaust pipe is large and long enough to accommodate this turbo whistle. Install. 1. Loosen the screw on the turbine whistle 2. Place the Turbo Sound Whistle body into the exhaust muffler with the larger opening facing the inside of the muffler 3. Tighten the screws on the Turbo Sound Whistle and tighten the items to prevent them from falling off while driving. 4. Professional installation is always recommended, no refunds will be given for damaged products installed by yourself. Specification: [Product material] Aluminum alloy [Applicable models] Universal [Accessories list] 1*Turbo tail whistle L1*Wrench 1*Thimble Package Included: 1*Turbo tail whistle 1*L wrench 1*Thimble