{"product_id":"s-s-cycle-power-packs-harley-davidson-30","title":"S\u0026S Cycle 129\" Power Pack with Black Pushrod Tubes \u0026 Gear Drive Cam - Harley Milwaukee-Eight 2017-Up","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout S\u0026amp;S Cycle\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eS\u0026amp;S Cycle has built American V-twin performance parts in Viola, Wisconsin since 1958 — flywheels, carburetors, cams, cylinder heads and complete crate engines. When a Harley owner talks about a 124, a 128 or a 131 build, they are usually talking about S\u0026amp;S. Few names carry more weight with engine builders in this space.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eThe S\u0026amp;S Cycle Power Package is a complete engine build kit designed to unlock significant horsepower. It combines 4.32-inch big bore cylinders with a matched camshaft, cam plate, and oil pump, along with all supporting components. This system is engineered for reliable performance without requiring a complete engine teardown and rebuild from scratch.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eAchieve big-bore displacement with 4.32-inch cylinders\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized power with a matched camshaft and cam plate\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEnsure engine health with a high-flow oil pump\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eComplete cam chest components for a seamless build\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEngineered for reliable, high-performance output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen it's time to take your Harley-Davidson's performance to the next level, the S\u0026amp;S Cycle Power Package offers a robust solution. This kit provides a coordinated set of high-performance components, ensuring that your big-bore upgrade is not just powerful, but also reliable. It's an excellent choice for riders who want a comprehensive engine modification designed for maximum output and durability.\u003c\/p\u003e\u003ch3\u003eUnleash Serious Horsepower\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFeatures 4.32-inch big bore cylinders for a substantial increase in displacement\u003c\/li\u003e\n\u003cli\u003eIncludes a matched camshaft and cam plate for optimized engine breathing\u003c\/li\u003e\n\u003cli\u003eHigh-flow oil pump ensures consistent lubrication under demanding conditions\u003c\/li\u003e\n\u003cli\u003eComplete cam chest package for a fully integrated performance upgrade\u003c\/li\u003e\n\u003cli\u003eDesigned for reliable performance, even at higher output levels\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePro-Level Engine Enhancement\u003c\/h3\u003e\u003cp\u003eInstalling the S\u0026amp;S Cycle Power Package is a serious engine modification that will transform your Harley's power delivery. Due to the nature of this upgrade, professional installation by an experienced Harley technician or a specialized performance shop is highly recommended. A proper dyno tune will also be essential to calibrate your fuel and ignition systems to the new components, ensuring peak performance and engine longevity.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\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 310-1228D\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 44.19 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat's included in the S\u0026amp;S Cycle Power Package?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe Power Package includes 4.32-inch cylinders, a matched cam, cam plate, oil pump, and all cam chest gaskets and hardware needed for installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need to completely tear down my engine for this installation?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, this is a complete cylinder and top-end replacement that requires engine removal and disassembly. Installation should be performed by an experienced Harley technician or shop.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill this Power Package fit my specific Harley-Davidson model?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eS\u0026amp;S Cycle Power Packages are designed for specific Harley-Davidson engine platforms. Please use our Shop by Bike tool or consult S\u0026amp;S Cycle documentation to confirm exact year and engine size compatibility before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston Sets - Powersports\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"S\u0026S Cycle\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/s-s-cycle\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"S\u0026S Cycle 4.32-inch Big Bore Power Package - Harley Touring, Softail \u0026 Dyna\",\"item\":\"https:\/\/vtwinbikers.com\/products\/s-s-cycle-power-packs-harley-davidson-30\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What's included in the S\u0026S Cycle Power Package?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Power Package includes 4.32-inch cylinders, a matched cam, cam plate, oil pump, and all cam chest gaskets and hardware needed for installation.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to completely tear down my engine for this installation?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, this is a complete cylinder and top-end replacement that requires engine removal and disassembly. 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