CYLINDER WORKS CYLINDER STD BORE HC KIT 60004-K01HCReady to install, direct bolt on cylinders require no re plating and look virtually identical to the OEM cylinders, Cylinder kit comes with matched Vertex pistons to ensure longevity, performance and reduced engine noise, Kit includes cylinder, piston, rings, pins, clips and top end gasket kit, Nickel silicon carbide plated for long life, Made in the USA