This 3-5/8" big bore kit can be used to replaced the cylinders and pistons of an engine that has been upgraded with S&S 96" Hot Set Up Kit with stock cylinders headers. The kit can also be used to upgrade and engine with an S&S 89" stock bore stroker kit to 96".; 3-5/8" bore Natural Aluminum finish 9.75:1 Compression ratio 96" Displacement 4-5/8" stroke length Cylinders are produced from premium aluminum castings with cast in liners Includes cylinders, pistons, rings and gaskets