Bullet Points:1. Excellent Material - Made of aluminum which is first-grade and is of excellent quality, our Whistle is lightweight and durable. Wonderful aluminum universal car sound whistle.2. Easy to Install - Our exhaust muffler pipe whistle car roar maker is easy to be installed on cars, trucks, or motorcycles. And it is universal. Suits all vehicles.3. S Size - This exhaust pipe whistle is suitable for exhaust pipes that have a diameter from 32 to 43 mm and a displacement from 1.0 to 1.6. Check to see if your cars can fit.4. Sound Effect - After using this sound whistle, you will be able to make your cars sound like a charge car with a system or exhaust . 5. Package Information - There will be 1 piece of our exhaust sound whistle in the package for you if you make a purchase. And there are 5 colors for you to choose from, which are red, blue, gold, black, and silver. Description:1. Whistle, 1PCS S Size Aluminum Universal Car Sound Whistle, Exhaust Muffler Pipe Whistle Car Roar Maker, Red, Blue, Gold, Black, SilverHow to Install:1. Loosen the screw on the whistle.2. Place the sound whistle into the exhaust muffler with the larger opening towards the inside of the muffler.3. Tighten the screw on the whistle so that it does not fall off when driving. 4. Profeional installation is always recommended. Type: Whistle Material: Stainle Steel S Size Specifications:1. Name: Car Sound Whistle2. Material: Aluminum + Iron3. Colors: Red, Blue, Gold, Black, Silver4. Effect: Make your car sound like a vehicle with a system or exhaust 5. Suitable For: Exhaust pipes that have a diameter from 32 to 43 mm and a displacement from 1.0 to 1.6 Features:1. Easy to Install2. No Welding or Drilling Is Required 3. Lightweight, Durable Package List:Car Sound Whistle *1Note:1. Due to different lighting and screen settings, the color of the item may be slightly different from the picture.Please allow for slight size differences due to manual measurements. 2. The whistle is not suitable for extremely curved tailpipes. Make sure the exhaust pipe is big and long enough to accommodate this sound whistle.