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310-1226

S&S Cycle 129" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Non-Highlighted Fins - M8

    • Transform 107" oil-cooled M8 into 129" with no case machining required
    • Big bore cylinders come with matching cam, cam plate and oil pump
    • Independent scavenge sections for flywheel cavity and cam chest
    • Magnet in cam chest to help prevent debris from entering oil pump
    • Feature high-performance conical single-wire S&S valve springs
    • Original engine serial numbers are retained
    • Passage plugs are removable for servicing
    • Debris screen in both scavenge pickups
    • MLS (multi-layered steel) head gaskets
    • Performance matched 550 cam
    • Works with stock crankcase
    • Made in the USA