TOOGOO(R) Turbo Vehicle Sound Whistle Exhaust Pipe Tailpipe Blow-off Valve Aluminum S Black 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. Size:S(1.5 * 10.2cm)