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 car'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 car'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 car'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 includes: 1 x turbo whistles 1 x wrench