{"product_id":"s-s-cycle-cylinder-piston-kits-harley-davidson-12","title":"S\u0026S Cycle Cylinder \u0026 Piston Kits — Harley-Davidson Street Glide, Softail Fat Boy 114, Road King Special (2017-2026)","description":"\u003cp\u003eS\u0026amp;S Cycle 4.320\" bore cylinder and piston kit transforms a 107\" M8 engine to 129\" or a 114\" to 132\" with a bolt-on big-bore package that requires no machine work to factory crankcases. Massive displacement gain delivers significant horsepower and torque while keeping the engine bay profile stock.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e4.320\" bore cylinder\u003c\/li\u003e\n  \u003cli\u003eWorks with stock crankcases — no machine work required\u003c\/li\u003e\n  \u003cli\u003eMLS multi-layered steel head gaskets\u003c\/li\u003e\n  \u003cli\u003ePowder coat finish matches factory\u003c\/li\u003e\n  \u003cli\u003eRetains stock engine height\u003c\/li\u003e\n  \u003cli\u003eCubic Inch Cam Cover Badge included\u003c\/li\u003e\n  \u003cli\u003eMade in USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e S\u0026amp;S Cycle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 910-0845A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 4.320 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Engine Components \/ Piston Sets - Powersports\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 29.56 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Milwaukee-Eight (M8) engines: 107\" base displacement to 129\", or 114\" base displacement to 132\".\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eDo I need to have my crankcases machined?\u003c\/h3\u003e\n\u003cp\u003eNo — this kit is designed as a slip-in big bore. Stock crankcases require zero machine work for installation.\u003c\/p\u003e\n\u003ch3\u003eWhat displacement will my engine be after installation?\u003c\/h3\u003e\n\u003cp\u003eA 107\" M8 becomes 129\"; a 114\" M8 becomes 132\". Your starting displacement determines your final size.\u003c\/p\u003e\n\u003ch3\u003eWill I need a tuner after installing this kit?\u003c\/h3\u003e\n\u003cp\u003eA fuel and ignition tune is strongly recommended to optimize power delivery with the larger displacement.\u003c\/p\u003e\n\u003ch3\u003eDoes this affect engine height or width in the frame?\u003c\/h3\u003e\n\u003cp\u003eNo — the kit retains stock engine height and profile, so it fits in the stock engine bay without modifications.\u003c\/p\u003e\n\u003ch3\u003eWhat's included in the kit?\u003c\/h3\u003e\n\u003cp\u003eCylinder, piston, MLS head gaskets, hardware, and a Cubic Inch Cam Cover Badge. Refer to S\u0026amp;S installation documentation for additional items like rings and bearings if needed.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53040425959535,"sku":"T14-852166","price":1643.95,"currency_code":"USD","in_stock":false}],"url":"https:\/\/vtwinbikers.com\/products\/s-s-cycle-cylinder-piston-kits-harley-davidson-12","provider":"Vtwinbikers","version":"1.0","type":"link"}