This 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", 4-5/8" or 4-3/4" stroke flywheels. 4-1/2" Stroke - 84" - 8.4:1 Compression 4-5/8" Stroke - 86" - 9.4:1 Compression 4-3/4" Stroke - 88" - 10.8:1 Compression