Universal Turbo Sound Exhaust Muffler Pipe Whistle Fake Blow-off BOV Simulator M Brand new and high quality. Lightweight and Durable. Make your car sound like a turbo vehicle with the turbo system or blow off valve. Easy to install,No welding or drilling needed. Size:M. Tail Pipe:37-48. Lenght:11cm. Displacement:1600-2000cc Color:Silver. Fitment:Universal Fits for all vehicle with exhaust pipe diameter small than 2.5" round. Size:10.5cm x 2.5cm x 2.5cm - 4.13inch x 0.98inch x 0.98inch. Installation: 1.Loosen the screw on the Turbo Sound Whistle. 2.Place the Turbo Sound Whistle body inside the exhaust muffler with the larger opening facing the inside of the muffler. 3.Screw the screws on the Turbo Sound Whistle to tighten the item so it doesn't fall off while driving. 4.Professional installation is always recommended, products damaged through self-installation will not be refunded.