GOOFIT 57.4mm Cylinder Head with Gasket for 4 Stroke GY6 150cc ATV Scooter 157QMJ Engine Part 57.4mm bore This item fit for 4 Stroke GY6 150cc Engine Scooter(read description for fitment infos) Package: cylinder head,gaskets,spark plug,studs Arrival within 1-2 days (Sold by GOOFIT and Fulfilled by Amazon) Arrival within 7-15 days (Ships from and sold by GOOFIT)