Aluminum Turbo Sound Whistle Exhaust Pipe Tailpipe Blow off Valve 11.5x3.5cm Silver for Car Modification Features： 1、Aluminum alloy material, solid installation, loud sound. 2、The bigger of the size, the louder of the sound. 3、Make your vehicle sound like a turbo vehicle with the turbo system or blow off valve. 4、Applicable to all kinds of cars, motorcycles and racing cars. 5、Easy to install on the car\u0027s tailpipe. Specification： Features: Aluminum alloy material, solid installation, loud sound. The bigger of the size, the louder of the sound. Make your vehicle sound like a turbo vehicle with the turbo system or blow off valve. Applicable to all kinds of cars, motorcycles and racing cars. Easy to install on the car's tailpipe. Installation: 1. Loosen the bolt on the Turbo Sound Whistle. 2. Insert the the Turbo Sound Whistle into the tailpipe. 3. Tighten the bolt so as not to fall off while driving. Note: 1. Please make sure the tailpipe is big and long enough to contain the Turbo Sound Whistle. 2. Professional installation is always recommended, products damaged through self-installation will not be refunded. 3. Please check and re-tighten the bolt regularly. Specifications: Color: Silver Size: S, M, L, XL (Optional) Material: Aluminum Diameter: Approx. 3cm / 1.2in Length: Approx. 11cm / 4.3in Weight: 96g / 3.38oz Package List: 1 * Turbo Sound Whistle 1 * Small Spanner 1 * Screw Package List： 1 * Turbo Sound Whistle 1 * Small Spanner 1 * Screw