Intended to replace the cylinders and pistons of a 80" Shovelhead engine and maintain the stock compression ratio of 8:1. Compatible with stock or S&S cylinder heads. Includes S&S 3.5" bore high tensile cast iron cylinders, 3.5" bore forged standard compression pistons for 80" (4.25" stroke) engines with rings and wristpins, head gaskets, S&S stainless steel bolts with washers, base nuts and base gaskets. Made in the U.S.A..
