Universal Car Turbo Sound Whistle Simulator Sound Pipe Auto Exhaust Muffler Pipe Feature: Made from light weight aluminum material,lightweight and durable,make your vehicle sounds like a turbo vehicle with the turbo system or blow off valve. Universal fits for all vehicle with right size. Easily installed on the car exhaust tailpipe. Perfect match and make your car fashionable and unique. Size: S: suitable for 1.0-1.6 displacement, exhaust pipe diameter 32-43 mm M: suitable for 1.6-2.0 displacement, exhaust pipe diameter 37-48 mm L: suitable for 2.0-2.4 displacement, exhaust pipe diameter 44-55 mm XL: suitable for more than 2.4 displacement, exhaust pipe diameter 56-85 mm Installation: Loosen the bolt on the Turbo Sound Whistle. Insert the the Turbo Sound Whistle into the tailpipe. Tighten the bolt so as not to fall off while driving. Note: Pleases make sure the caliber of your Exhaust Pipe before purchasing.Under the premise of proper installation size, try to choose a larger size, because the principle of whistle sound is airflow. The larger the whistle, the easier it is to make a sound. Not work for curved exhaust pipe. Package Included: 1 * Exhaust pipe Whistle