{"product_id":"s-s-cycle-cylinder-piston-kits-harley-davidson-39","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 131 cubic inch cylinder and piston kit for 2017+ Harley Milwaukee-Eight engines, engineered to bolt into stock crankcases without machine work. Gains substantial displacement and horsepower while maintaining the original engine appearance and serial numbers for a true sleeper build.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHuge displacement increase with corresponding power gain\u003c\/li\u003e\n  \u003cli\u003eOriginal engine serial numbers retained\u003c\/li\u003e\n  \u003cli\u003ePowder coat finish matches factory finishes\u003c\/li\u003e\n  \u003cli\u003eIncludes 131\" cam cover badge\u003c\/li\u003e\n  \u003cli\u003eWorks with stock crankcases\u003c\/li\u003e\n  \u003cli\u003eRetains stock engine height\u003c\/li\u003e\n  \u003cli\u003e4.250\" bore, 4.625\" stroke\u003c\/li\u003e\n  \u003cli\u003e11.0:1 compression ratio\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 320-0621\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 131 cubic inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 4.250\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStroke:\u003c\/strong\u003e 4.625\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 11.0:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 70 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Engine Components \/ Piston Sets - Powersports\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Milwaukee-Eight (M8) engines, 2017 model year and newer.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWill this kit fit my M8 engine without machine work?\u003c\/h3\u003e\n\u003cp\u003eYes — the kit is designed to bolt directly into stock M8 crankcases with no boring, honing, or machining required.\u003c\/p\u003e\n\u003ch3\u003eDo I need to change my engine serial number or re-register my bike?\u003c\/h3\u003e\n\u003cp\u003eNo — S\u0026amp;S retains your original engine serial numbers, so your registration and title remain unchanged.\u003c\/p\u003e\n\u003ch3\u003eWhat's included in the kit?\u003c\/h3\u003e\n\u003cp\u003eThe cylinder and piston assembly, all necessary gaskets for installation, and a 131\" cam cover badge if you want to display the upgrade.\u003c\/p\u003e\n\u003ch3\u003eDoes this increase engine height or affect my current setup?\u003c\/h3\u003e\n\u003cp\u003eNo — the kit retains stock engine height and works with your stock crankcase, so fitment remains the same as factory.\u003c\/p\u003e\n\u003ch3\u003eWhat kind of power gain can I expect?\u003c\/h3\u003e\n\u003cp\u003eDisplacement increases from 107 to 131 cubic inches typically result in substantial horsepower and torque gains. Dyno results vary based on intake, exhaust, and tune.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53040433922159,"sku":"T14-1026223","price":2695.95,"currency_code":"USD","in_stock":false}],"url":"https:\/\/vtwinbikers.com\/products\/s-s-cycle-cylinder-piston-kits-harley-davidson-39","provider":"Vtwinbikers","version":"1.0","type":"link"}