Universal Car Turbo Sound Whistle Simulator Sound Pipe Auto Exhaust Muffler Pipe Universal Car Turbo Sound Whistle Simulator Sound Pipe Auto Exhaust Muffler PipeFeatures:After installed this product, the pressure blowing out of your exhaust will make your vehicle sounds like a turbo vehicle with the turbo system or blow off valve.Made of high quality aluminum, light weight and durable.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.Specifications:Color: Black/Blue/Red/Sliver/GoldMaterial: aluminum alloySize: S, suitable for 1.0-1.6 displacement, exhaust pipe diameter 32-43mm < about 71g >Size: M , suitable for 1.6-2.0 displacement, exhaust pipe diameter 37-48mm < about 87g >Size: L , suitable for 2.0-2.4 displacement, exhaust pipe diameter 44-55mm < about 102g >Size: XL , suitable for displacement above 2.4, exhaust pipe diameter 56-85mm < about 136g >Please note the required model and color when placing an order, otherwise it will be sent randomlyPackage includes:1PC * Turbo Sound WhistleNotes:1. Please make sure the tailpipe is big and long enough to contain the Turbo Sound Whistle.2. Professional installation is highly recommended, products damaged through self-installation will not be refunded.3. Please check and re-tighten the bolt regularly.