S&S CYCLE 3-5/8" Big Bore Cylinder and Piston Kit — 3.625" bore, 88" displacement, 4.25" stroke, 7.5:1 compression – 79-84 Big Twin, 79-83 Touring, 82-84 FXR, 84 Police

Engine builders and restorers will appreciate this complete big-bore cylinder and piston kit — ideal for assembling a larger-displacement stroker motor or replacing worn cylinders and pistons.

The kit includes high-tensile cast iron cylinders, forged pistons with rings and wristpins, head gaskets, stainless head bolts with washers, base nuts and base gaskets, and all necessary hardware.

Installation requires machining: crankcases must be bored to accept the larger cylinders and the stock flywheel assembly should be rebalanced as part of the build. Made in the U.S.A. 🇺🇸🏍️