Practical Universal Simulator Whistler Wear-Resistant Metal Practical Description: Easy to install, this sturdy car turbocharged sound whistle is very easy to install on the exhaust pipe of the car, and it is a universal accessory for all models. Please do not install it in a pipe that the entrance exceeds 2.5 inches. It will make your vehicle sound like a turbo vehicle with a turbo system or blow off valve. The turbocharged whistle is made of lightweight aluminum CNC and processed from 6061 T-6 aluminum, which is durable and lightweight. There are four specifications for your choice, S, M, L, XL. This turbo whistle is suitable for car and motorbike.Item Name: Turbo Whistle Material: 6061 Aluminum Alloy Specification: S, M, L, XL Size Details: S Size: 10.2cm x 5.25cm(Approx.)M Size: 10.3cm x 5.9cm(Approx.)L Size: 11.6cm x 6.3cm(Approx.)XL Size: 12cm x 6.6cm(Approx.)Notes: S size is suitable for 1.0-1.6 displacement and 32-43mm diameter exhaust pipe. M size is suitable for 1.6-2.0 displacement and 37-48mm diameter exhaust pipe. L size is suitable for 2.0-2.4 displacement and 44-45mm diameter exhaust pipe. XL size is suitable for above 2.4 displacement and 56-85mm diameter exhaust pipe. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.Package Includes: 1 x Turbo Whistle1 x Wrench1 x Bolt