Yields 107 cubic inches when used with your stock crank and rods 10.5:1 compression ratio Flat top piston Kit includes the famous Revolution aerospace grade all aluminum cylinders with nickel-silicon-carbide electroplated bores which have 10 times the wear resistance of traditional cast iron lined cylinders Revolution Performance pistons and high performance head gaskets This is a true bolt-on kit and absolutely no machine work is required Revolution cylinders are the only cylinders in the world that carry a lifetime warranty against warping and/or plating defects Black finish No case boring required