Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders Big Bore Kit gives your vehicles more displacement Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise Nickel Silicon Carbide plated for long life Kits come complete with big bore gaskets, cylinder, bigger piston, rings, pin and clips Made in the U.S.A.