Compatibility Fits GY6 engines and vehicles: 50cc, 70cc, 90cc, 110cc, 125cc, 150cc scooters, ATVs, gokarts, mopeds, quads, 4wheelers, dune buggies, sandrails and models from Taotao, Sunl, Coolster, Jonway, Roketa. Why you need this kit Stops exhaust leaks and secures the header: worn studs, nuts and gaskets are a common cause of exhaust leaks, poor performance and increased noise. Replacing them restores a tight seal and reliable exhaust flow. Durable replacement parts: made from quality metal to withstand heat, vibration and repeated installation, extending the life of your exhaust connection. Readytoinstall: includes the studs, nuts and multiple gaskets you need to complete the without waiting for extra parts. Key features and specifications Exhaust studs: 32 mm (1.26 in) long, M6 thread, 5.8 mm (0.22 in) thread diameter. Nuts / caps: 32 mm (1.26 in) long, M6 thread, 5.1 mm (0.20 in) thread diameter. Bronze exhaust gasket: outer diameter 30 mm (1.18 in), inner diameter 23.2 mm (0.91 in), thickness 5.6 mm (0.22 in). Material: quality metal for strength and heat resistance. Package contents 1 x Exhaust gasket 2 x Exhaust screws (studs) 2 x Exhaust nuts 2 x Gaskets 2 x Spring gaskets Packaged in a Brand How it solves common problems Eliminates exhaust leaks that cause reduced power and noisy operation by providing properly sized studs, nuts and gaskets for a secure fit. Reduces the need for frequent retightening by using durable metal components that resist stretching and corrosion. Simplifies routine maintenance and repairs by supplying all pieces in one kit. Typical use scenarios worn exhaust studs and gaskets on a GY6 125cc scooter after longterm use to stop a ticking exhaust leak and restore normal sound and performance. Install before a long ATV or dune buggy ride to ensure the exhaust header is securely fastened and won't loosen under vibration. Use during engine or exhaust work on a 50cc–150cc gokart or quad to complete the reassembly with correctly sized studs and gaskets. Notes for installation Check thread condition in the cylinder head and crankcase before installation; use antiseize if recommended for your engine. Verify compatibility with your specific model and exhaust header dimensions using the provided sizes. This kit provides the correctsize studs, nuts and gaskets needed to or worn exhaust hardware on a wide range of GY6based small engines and compatible models listed above.