This high quality accessory is the performance 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 performance 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 performance exhaust gasket.NCY Gasket, Performance Exhaust – Vento / GY6 (steel / fiber)Fiber & steel exhaust gasket for use with GY6 engines with big-bore cylinder/head kits.Dimensions:Port ID: 29.8 mm Bolt to bolt spacing: 50 mm0500-1011