Size:L 33mm(Diameter)Material: AluminumColor: Red、Blue、Gold、BlackTail Pipe:44-55Lenght:11Displacement :2000cc more thanPackaged include: 1Pcs Turbo Sound Simulator WhistleInstallation:Loosen the screw on the Turbo Sound WhistlePlace the Turbo Sound Whistle body inside the exhaust muffler with the larger opening facing the inside of the mufflerScrew the screws on the Turbo Sound Whistle to tighten the item so it doesn't fall off while drivingProfessional installation is always recommended、 products damaged through self-installation will not be refundedWelcome to our shop and enjoy your shopping moment!Looking forward to come again! If you have any problems 、please fell free to contact with us .we will solve the problem as soon as possible .