This high quality accessory is the exhaust gasket for 50cc, 125cc, and 150cc GY6 Engines from NCY NCY is well known in the competitive riding market as the brand to use when modifying your rideDescription This high quality accessory is the exhaust gasket for 50cc, 125cc, and 150cc GY6 Engines from NCY. NCY is well known in the competitive riding market as the brand to use when modifying your ride. Let Monster Scooter Parts be your first source for accessories and mods from NCY with our great exhaust gasket.NCY Gasket, Exhaust – Vento / GY6 (copper)Copper & fiber or steel & fiber exhaust gasket for use with GY6 engine variants.Dimensions:Port ID: 27 mm Bolt to bolt spacing: 45-51 mm