Iglobalbuy 38mm Motorcycle Scooter Exhaust Muffler Pipe W/Movable Silencer Carbon Fiber With a removable silencer( DB killer), offers difference sound effect Connection Diameter: 38mm;Length: 320mm Aluminum carbon made, durable,no rust,corrosion Includes mounting clamp, rubber belt & springs Suitable for dirt bike street bike scooter atv quad and any other bike with pipe diameter 38mm