●Fitment:for GY6 GMB139 Engine 50cc 70cc 90cc 110cc 125cc 150cc Scooters ATVs Go Karts Moped Quad 4 Wheeler Dune Buggy. It may fits Scooters with GY6 50cc - 150cc Motors Sandrail Taotao Sunl Coolster Jonway Roketa etc ●Package include: 2 x Exhaust Studs 2 x Nuts 1 x Exhaust Gasket 2 x Spring Gasket 2 x Gasket 1 x Premium Metal Gasket ●Bolt to bolt spacing: 49mm, Inner port: 27 mm, Double Sided, Double layer Extra Thick! Your exhaust will makes no more noise! ●Durable Material: The exhaust studs nuts are made from metal, which is sturdy and can last long time. ●Easy to install, Please Check The Size Before You Buy It.