Universal Car Turbo Sound Whistle Muffler Exhaust Pipe Auto Blow-off Valve Simulator for All Cars Application: Universal fit for all vehicles with compatible exhaust size. Made from lightweight aluminum material. CNC machined for durability and precise construction. Easy to install with a sleek and modern appearance. Enhances vehicle aesthetics and provides a sporty exhaust sound effect. Note: The listed length refers only to the whistle component, not including the mounting frame. Suitable for use on various vehicle models. Function: - Simulates the sound of a turbocharged engine or blow-off valve during acceleration and deceleration. - Designed to be installed on aftermarket mufflers, cat-back, or axle-back exhaust systems. Does not produce sound when installed inside straight-through or high-flow mufflers without backpressure. Installation: 1. Loosen the mounting screw on the turbo sound whistle. 2. Insert the whistle into the exhaust pipe with the larger opening facing toward the muffler interior. 3. Tighten the screw securely to ensure the unit remains in place during operation. 4. Professional installation is recommended. Damage caused by improper self-installation is not covered by warranty. Package Includes: 1 x Car Turbo Sound Whistle