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S&S Cycle 4.32-inch Big-Bore Power Package - Harley Touring, Softail & Dyna
About S&S Cycle
S&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&S. Few names carry more weight with engine builders in this space.
The S&S Cycle Power Package is a complete big-bore kit designed to deliver reliable high-horsepower builds for your Harley-Davidson. It combines 4.32-inch big-bore cylinders with a matched cam, cam plate, oil pump, and all supporting components, making it a bolt-on solution that eliminates the guesswork of sourcing compatible top-end parts.
Why riders pick this
- Complete big-bore engine upgrade kit
- 4.32-inch big-bore cylinders
- Matched high-performance cam and cam plate
- OEM-spec oil pump included
- All required cam chest components
- Bolt-on design for simplified installation
This integrated system ensures that all critical engine components work in harmony, providing a robust foundation for serious performance gains. Riders looking for a straightforward path to increased displacement and power will find this kit an excellent choice for their V-twin.
Optimized for Power and Compatibility
- Features durable 4.32-inch big-bore cylinders
- Includes a matched high-performance cam and cam plate
- Comes with an OEM-spec oil pump for consistent lubrication
- All necessary cam chest components are included for a complete installation
- Designed as a complete kit to ensure component compatibility and performance
Seamless Engine Upgrade
Upgrading your Harley's engine can be complex, but the S&S Cycle Power Package simplifies the process by providing a pre-engineered solution. This kit is ideal for riders wanting to upgrade their Touring, Softail, or Dyna without the hassle of piecing together individual parts. Just ensure your motorcycle's engine displacement and year are compatible before starting your build.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 310-1107D
- Category: Engine Components / Piston Sets - Powersports
- Weight: 44.19 lb
Common questions
What components are included in this S&S Power Package?
This kit typically includes cylinders, pistons, rings, a matched cam, cam plate, oil pump, and all necessary gaskets and hardware for installation.
Is a fuel tune required after installing this kit?
Yes, a fuel tuner or ECM recalibration is strongly recommended to optimize performance and fueling with the increased displacement and cam profile.
Will this Power Package fit my Harley-Davidson?
This kit is designed for various Harley-Davidson engines. It is essential to verify specific engine displacement and year compatibility with S&S Cycle or a qualified builder before ordering.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | S&S Cycle |
| TYPE | Piston Sets - Powersports |
| SKU | T14-1020329 |
| WEIGHT | 44.19 lb |