S&S Cycle 2017+ M8 Models 132in/136in Big Bore Cylinder Kit (Blk Granite w/ Fins) - 4.320in Bore

The S&S Cycle High Compression 132" / 136" Big Bore Kit increases displacement, performance, torque, and horsepower for Harley Milwaukee-Eight engines (2017-2026). These are S&S's largest bolt-on kits, eliminating crankcase machining and preserving original engine serial numbers. They maintain factory engine height for easy installation and include all necessary gaskets. Features a 4.320" bore. Displacement and compression ratio vary based on piston dome and stroke. The 136" setup requires the S&S 4-5/8" Flywheel Assembly and is not compatible with the HD 4-5/8" flywheel. Made in the USA.