84" 86" or 88" 3-7/16" Bore Cylinder and Stroker Piston Kit for 1966-'84 HD® Big Twins - Gloss Black FInishThis 3 7 16" bore cylinder and piston kit can be used to build 84", 86", or 88" stroker engines, or the replace the cylinders and piston in an engine with an existing S&S stock bore stroker kit. Kit includes S&S 3 7 16" bore high tensile cast iron cylinders, 3 7 16" bore forged stroker pistons with rings and wristpins, head gaskets, S&S stainless steel head bolts with washers, base nuts, base gaskets. This kit can be used in engines with 4 1 2", 4 5