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Upgrade your M8 engine with the S&S Cycle 129" Big Bore Cylinder Kit, designed specifically for 107" engines. This bolt-on kit requires no machining of the crankcase, allowing for straightforward installation and quick performance gains. The kit retains the original engine serial numbers, ensuring compliance and authenticity, and features MLS (multi-layered steel) head gaskets for enhanced sealing and durability. The kit maintains the stock engine height, preserving your bike's handling characteristics while providing significant power upgrades. Included with the kit is a cam cover badge and all necessary gaskets and hardware, simplifying installation and reducing downtime. Made in the USA, this cylinder kit combines quality craftsmanship with reliable performance for your Harley-Davidson M8 engine. The wrinkle black finish with highlighted fins adds a rugged aesthetic appeal, complementing your bike's look while offering excellent heat dissipation and corrosion resistance.
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