CYLINDER WORKS CYLINDER STD KT 40002-K01Ready to install, direct bolt on cylinders require no re plating and look virtually identical to the OEM cylinders, Cylinder kit includes matched Vertex pistons to ensure longevity, performance and reduced engine noise, Nickel Silicon Carbide plated for long life, Kit comes complete with gaskets, cylinder, piston, rings, pin and clips, Big bore cylinders do not require machine work, Made in the USA