FitmentS size products are suitable for cars with a displacement of 1.0L-1.6L and an exhaust pipe diameter of 32-43 mm. FeatureThis turbo sound whistle simulates the turbo sound created by an engine. With our product, you dont need to own a racing car to experience loud turbo engine sounds made by it. MaterialMade of high quality and light weight aluminum, our products are durable, hold well and won't fall off easily. NoteTurbo sound whistle is not suitable for extremely curved tailpipes. Package2 * Turbo Sound Whistle (Yellow) Fitment Suitable for displacement of 1.0L-1.6L, exhaust pipe diameter 32-43 mm. Please state your model and year of manufacture by email before ordering if you are not sure. Thank you Specification Size: S Color: Yellow Length: 10.4cm Height: 1.9cm Material: High quality and light weight aluminum. Displacement: 1.0L-1.6L Tailpipe diameter: 32-43mm Please allow 1-3 mm difference due to manual measurement. Feature 1.Let your car roar and experience the turbo engine sound without buying a racing car. 2.This is a whistle imitating the sound of turbo pressure relief. It is clamped on the exhaust pipe, and the airflow through the exhaust pipe makes it make a sound. The larger the displacement, the larger the whistle, and the easier it is to make a sound. Installation Step1: Unscrew the product's bolts. Step2: Place the product into the tailpipe, larger opening towards the inside of the tailpipe. Step3: Retighten the bolts to secure the product. Package 2 * Turbo Sound Whistle (Yellow)