{"product_id":"s-s-cycle-cylinder-heads-harley-davidson-dyna-91cc-1","title":"S\u0026S Cycle Cylinder Heads — Harley-Davidson Dyna Wide Glide, Dyna Low Rider, Dyna Super Glide (1983-2020)","description":"\u003cp\u003eS\u0026amp;S Cycle cylinder heads for Harley-Davidson Dyna 91cc engines, engineered to increase flow and combustion efficiency over OEM castings. Direct bolt-on replacement designed for high-performance builds seeking improved breathing and power.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eIncreased flow over stock heads\u003c\/li\u003e\n  \u003cli\u003eDirect bolt-on replacement\u003c\/li\u003e\n  \u003cli\u003eSilver finish\u003c\/li\u003e\n  \u003cli\u003eOptimized for 91cc displacement\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 900-4278\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Silver\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Engine Components \/ Heads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Dyna 91cc engines as a direct replacement for stock cylinder heads.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eAre these a direct bolt-on for my Dyna?\u003c\/h3\u003e\n\u003cp\u003eYes — these heads are engineered as a direct replacement for Dyna 91cc stock castings with no modification required.\u003c\/p\u003e\n\u003ch3\u003eWill these heads alone increase my horsepower?\u003c\/h3\u003e\n\u003cp\u003eHeads improve breathing and combustion efficiency. Maximum gains come when paired with matching intake, exhaust, and fuel management tuning.\u003c\/p\u003e\n\u003ch3\u003eDo I need new pushrods or rocker arms?\u003c\/h3\u003e\n\u003cp\u003eCheck with S\u0026amp;S or your builder — some head modifications may require valvetrain geometry verification to ensure clearance and proper geometry.\u003c\/p\u003e\n\u003ch3\u003eWhat's the weight difference from stock?\u003c\/h3\u003e\n\u003cp\u003eS\u0026amp;S heads weigh 1 lb each. Stock Dyna heads are heavier, so this is a slight weight savings per head.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53040438018159,"sku":"T14-664036","price":1995.95,"currency_code":"USD","in_stock":false}],"url":"https:\/\/vtwinbikers.com\/products\/s-s-cycle-cylinder-heads-harley-davidson-dyna-91cc-1","provider":"Vtwinbikers","version":"1.0","type":"link"}