ITEM NAME:Turbo Sound Whistle Exhaust Pipe Tailpipe BOV Blow-off Valve Simulator Alum E8B9 Turbo Sound Whistle Exhaust Pipe Tailpipe BOV Blow-off Valve Simulator Alum E8B9 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. Material: Aluminum 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. Notes: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 Material: Aluminum Size: M Diameter: Approx. 1.8cm / 07in Length: 10.2cm / 4in Weight: 67g / 2.36oz Package includes:1 X Turbo Sound Whistle 1XSmall Spanner 1X Screw Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.