Size: Modified turbo whistle for cars; do not install on an intake pipe larger than 2.5 inches (6.35 cm). This whistle mounts directly as a replacement for the original exhaust pipe. The included kit is easily installed on the car's exhaust pipe. Rigorous quality control ensures it meets standards and is compatible with all vehicles. Material: Made from lightweight CNC-machined 6061 T-6 aluminum alloy, this whistle is durable, rust-resistant, corrosion-resistant, and wear-resistant. Features: This universal turbo whistle gives your car a unique sound when starting and driving! Installation: Once installed, the turbo whistle produces a sound similar to that of a turbocharger or blow-off valve. This universal turbo whistle is easy to install and has a sleek and modern design. An excellent choice for your vehicle! Note: Metal transportation may cause friction; therefore, minor defects may occur on the product.