Features: 1. After installing this product, the pressure blowing out of your exhaust will make your vehicle sounds like a turbo vehicle with the turbo system or blow off valve. 2. This is the best choice to decorate or upgrade your car39;s appearance and performance. Make your car fashionable and unique by upgrading without spending too much. 3. Fits most cars, DIY and easy to install on the car39;s tailpipe. Install this product to make your car stylish and eye-catching while driving; improving your driving interest. 4. Made of high-quality aluminum, lightweight and durable 5. Easy to install on the car39;s tailpipe Installation: 1. Loosen the bolt on the turbo sound maker. 2. Insert the turbo sound maker into the tailpipe. 3. Tighten the bolt so as not to fall off while driving. Specification: Material: Aluminum alloy Color: Black, blue, gold, red, silver Product size: As shown S: Suitable for exhaust pipe diameter 32-43 mm M: Suitable for exhaust pipe caliber 37-48 mm L: Suitable for exhaust pipe diameter 44-55 mm XL: Suitable for exhaust pipe caliber 56-85 mm Weight: S-68g; M-78g; L-102g; XL-123g Include: turbo whistles wrench Package List: 1 x turbo whistles 1 x wrench