S&S Cycle 96 Sidewinder Big Bore Stroker Kit for Harley The S&S 96 Sidewinder big bore stroker kit provides a practical way to increase engine displacement from a stock 80 to 96. It includes S&S 3-5/8 bore aluminum Sidewinder cylinders, 9.75:1 forged pistons, and a 4-5/8 stroke dynamically balanced S&S flywheel assembly with heavy-duty connecting rods and mainshafts for dependable performance. Head, base, and exhaust gaskets are also included to support a complete installation. Features: S&S 3-5/8 bore cylinders 9.75:1 forged pistons 4-5/8 stroke dynamically balanced S&S flywheel assembly S&S heavy-duty connecting rods and mainshafts Head gaskets, base gaskets, and exhaust gaskets Made in the USA Notes: Stock cases will need to be bored out to 3-5/8 to accommodate the larger displacement. 1977-1989 style pinion gears, spacer, and nut are required when installing S&S flywheel assemblies. For installation in 1990-2000 or scratch built engines, order the S&S Pinion Shaft Conversion Package separately.