Features: Cylinder kit includes matching Vertex pistons to ensure longevity, performance and reduced engine noise. Cylinders have a nickel silicon carbide cylinder sleeve . Look virtually identical to OEM cylinders . Kit includes cylinder, pistons, rings, pin, clips and gaskets. Made in the USA. Cylinder does not require machine work (unless noted).. Requires case machining. Makes 277 cc when used with Hot Rods Crankshaft #4183. Kit Includes: • Cylinder • Piston Kit • Top-End Gasket Kit.