{"product_id":"s-s-cycle-129-power-package-engine-performance-kit-for-m8-chain-drive-oil-cooled-highlighted-fins-part-310-1225","title":"S\u0026S CYCLE 129\" Power Package Engine Performance Kit for M8 – Chain Drive, Oil Cooled, Highlighted Fins – Part 310-1225","description":"\u003cp\u003e129\" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Highlighted Fins - M8\n\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eUpgrade your Harley-Davidson M8 engine with the S\u0026amp;S CYCLE 129\" Power Package Engine Performance Kit, designed for seamless installation without case machining. This high-performance kit transforms a 107\" oil-cooled M8 engine into a powerful 129\" setup, offering increased displacement and torque for enhanced riding experience. The kit includes big bore cylinders that come with a matching cam, cam plate, and oil pump, ensuring optimal compatibility and reliable performance. The independent scavenge sections for the flywheel cavity and cam chest help maintain proper oil circulation, while a magnet in the cam chest assists in debris prevention to protect your engine components. Featuring high-performance conical single-wire S\u0026amp;S valve springs, this kit is engineered for durability and consistent valve operation under demanding conditions. Original engine serial numbers are retained, ensuring compliance with warranty and registration requirements. Passage plugs are removable for straightforward servicing, and debris screens in both scavenge pickups help keep oil passages clear, reducing maintenance needs. The MLS (multi-layered steel) head gaskets provide a robust seal to handle increased pressure, and the performance-matched 550 cam enhances power delivery across the RPM range. Compatible with stock crankcases, this kit offers a straightforward upgrade path for Harley enthusiasts seeking increased performance. Proudly made in the USA, the S\u0026amp;S CYCLE 129\" Power Package Kit delivers reliable, high-quality performance enhancements for your M8 engine, combining proven design, innovative features, and durable construction to meet the demands of serious riders.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eTransforms 107\" oil-cooled M8 into 129\" with no case machining required\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eIncludes big bore cylinders with matching cam, cam plate, and oil pump for seamless compatibility\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eIndependent scavenge sections for flywheel cavity and cam chest enhance oil circulation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMagnet in cam chest helps prevent debris from entering the oil pump\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHigh-performance conical single-wire S\u0026amp;S valve springs for durability\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eRetains original engine serial numbers for warranty and registration compliance\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eRemovable passage plugs for easier servicing\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDebris screens in both scavenge pickups keep oil passages clear\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMLS (multi-layered steel) head gaskets provide a durable seal under increased pressure\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePerformance-matched 550 cam for optimized power delivery\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCompatible with stock crankcase for straightforward installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMade in the USA for quality assurance\u003c\/li\u003e\u003c\/ul\u003e","brand":"S\u0026S CYCLE","offers":[{"title":"Default Title","offer_id":49883664154817,"sku":"0904-0101","price":3359.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0060\/5929\/4802\/files\/2758473.png?v=1767397628","url":"https:\/\/teamdreamrides.com\/products\/s-s-cycle-129-power-package-engine-performance-kit-for-m8-chain-drive-oil-cooled-highlighted-fins-part-310-1225","provider":"Team Dream Rides","version":"1.0","type":"link"}