S&S Cycle Finned Cylinder & Piston Kit - Harley Milwaukee-Eight
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.
Upgrade your Harley-Davidson Milwaukee-Eight engine with the S&S Cycle Finned Cylinder and Piston Kit, engineered for improved cooling and enhanced performance. This complete assembly provides a direct fit for M8 engines, delivering increased displacement and compression. It's a reliable way to restore or significantly upgrade your modern Harley's powerplant.
Why riders pick this
- Enhanced cooling with finned cylinder design
- Complete piston and cylinder assembly
- Increases displacement and compression for more power
- S&S Cycle engineering and quality
- Direct fit for Milwaukee-Eight engines
This S&S Cycle cylinder and piston kit features a specialized finned cylinder design, which is crucial for enhanced heat dissipation, especially in higher-performance applications. The complete piston and cylinder assembly is built with S&S Cycle's renowned engineering and quality, ensuring both durability and a substantial boost in power. It's designed to bolt directly onto your M8 engine, making it a robust foundation for your next performance build.
Cooler Running, Harder Pulling M8
- Finned cylinder design for enhanced cooling efficiency
- Complete piston and cylinder assembly for M8 engines
- Increases engine displacement and compression
- S&S Cycle engineering for reliable performance
- Direct fit for Milwaukee-Eight engine models
Performance Foundation for Your V-Twin
The S&S Cycle Finned Cylinder and Piston Kit is an essential upgrade for any Milwaukee-Eight rider pushing their bike hard. Better cooling translates to more consistent performance and longer engine life, especially when paired with other performance modifications. For optimal results, we recommend a professional installation, followed by a custom dyno tune to dial in the fuel and ignition maps, maximizing the power and efficiency of your upgraded M8.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-1010A
- Category: Engine Components / Piston Sets - Powersports
- Weight: 30 lb
Common questions
What displacement does this kit add to my M8?
The exact displacement gain depends on specific bore and stroke details of your M8 engine. We recommend consulting S&S Cycle documentation or contacting them directly with your model year for precise figures.
Do I need to tune my bike after installation?
Yes, absolutely. After any piston and cylinder work, professional tuning is essential to optimize fuel delivery and ignition timing for the new displacement and compression ratio, ensuring peak performance and engine longevity.
Is this a complete bolt-on kit or does it require machine work?
This S&S Cycle kit is a complete piston and cylinder assembly designed for direct fitment on Milwaukee-Eight engines. While it's a direct fit, professional installation is recommended due to the complexity of engine disassembly and assembly.
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 | T14-871886 |
| WEIGHT | 30.0 lb |