93" High Compression 3-5/8" Big Bore Cylinder and Piston Kit for S&S SH93 Engines or 1966-84 HD® Big Twins With S&S 93" Sidewinder Kit - Gloss Black FinishThis 3 5 8" big bore kit may be used to replace the cylinders and pistons of an S&S SH93 high compression engine or a stock HD shovelhead engine that has been upgraded with an S&S 93" Hot Set Up Kit . This kit may also be used to upgrade an engine with an S&S 84" stock bore stroker kit to 93". Stock crankcases must be bored to accomodate the 3 5 8" bore cylinders, but the 4 1 2" stroker flywheel assembly does not need to be rebalanced. The kit