Features:1. Made of aluminum alloy, high temperature resistant, no melting, lightweight and durable.2. It is easy to install on the exhaust pipe of a car by adjustable clamp.3. After installing this turbocharged sound stimulated whistle, the air blowing out from the exhaust pipe will make your car sound like a car equipped with a turbocharged system.4. Attention: The product is only suitable for straight exhaust pipes, NOT for curved exhaust pipes.Material: aluminum alloySize: as shownS/1.0-1.6 displacement/32-43 mm exhaust pipe diameterM/1.6-2.0 displacement/37-48 mm exhaust pipe diameterL/2.0-2.4 displacement/44-55 mm exhaust pipe diameterXL/>2.4 displacement/56-85 mm exhaust pipe diameterPackage Includes:1 x Car Turbo Whistle"