GY6 150cc 4 Stroke Stock Exhaust Pipe Silencer Muffler Assembly Scooters Stock Muffler/Silencer Assy for Scooters GY6 150cc 4 Stroke Engines Muffler Outer Diameter: 113mm, Length: 411mm Fit most GY6 Engine 125cc 150cc Mopeds, Scooters, Go Karts Fast free shipping from US Location