ITEM NAME:Sound Exhaust Muffler Pipe Whistle Blow Off Valve Bov Simulator Xl Size C8Z6 Sound Exhaust Muffler Pipe Whistle Blow Off Valve Bov Simulator Xl Size C8Z6 [High quality]Turbocharged whistle is made of high quality lightweight aluminum and is not easy to fade. [Easy to install] It can be installed in 2 minutes to make your vehicle sound like a turbine with a turbine system or a blow valve. [Tips] Please note: Turbo sound whistle is not suitable for extremely curved tailpipes. Large or small sounds are also related to the dozing and personal feeling of the exhaust. The sound is too big or too small, and the product quality problem after installation. Due to the modification of the original car's light bulldozer or tail drum, each model may have little or no sound. [Very important, please note] TUTOOLS Turbo Sound whistle size is XL, XL is suitable for 2.4T, and the diameter is 3.1 cm. Make sure that the diameter of your exhaust pipe will not be installed if the whistle diameter is greater than or equal to the inner diameter of the exhaust pipe. Tips:The sound is similar or not based on personal feelings and hobbies. After all, this is a counterfeit sound. If you mind, please order carefully. installation method: Note: Loosen the bolts on the turbine whistle. 2. Insert the Turbo Sound whistle into the tailpipe. 3. Tighten the bolt so that it does not fall off while driving. Colour:silver Material:Aluminum alloy Size:12*6.9cm Package Contents: 1* car turbo whistle 1* matching wrench