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!
Compatibility: for GY6 GMB139 engines ranging from 50cc to 150cc, including scooters, ATVs, go-karts, mopeds, quads, and dune buggies. This part is suitable for scooters equipped with GY6 motors from 50cc to 150cc, such as those from Sandrail, Taotao, Sunl, Coolster, Jonway, and Roketa, among others.
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.