S&S Cycle 4.250-inch Bore Front Cylinder Wrinkle Black with Highlight - 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.
This S&S Cycle front cylinder is designed specifically for 2017 and newer Harley-Davidson Milwaukee-Eight models, offering a significant 4.250-inch bore upgrade. It features a striking wrinkle black finish with a polished highlight, designed to bolt directly onto stock M8 cases for increased cubic inches and a noticeable boost in horsepower.
Why riders pick this
- 4.250-inch bore for increased displacement
- Wrinkle black finish with polished highlight
- Designed for 2017+ Milwaukee-Eight (M8) engines
- Bolts onto stock M8 cases for easy installation
For Milwaukee-Eight riders who demand both performance and style, this S&S Cycle front cylinder delivers. The 4.250-inch bore provides the foundation for a substantial displacement increase, translating into more raw power for your V-twin. Beyond its performance capabilities, the wrinkle black finish with a polished highlight adds a custom, aggressive look to your engine, ensuring your bike stands out from the crowd.
Performance and Style for Your M8
- Achieves a 4.250-inch bore for enhanced displacement and power
- Designed for direct compatibility with 2017+ Milwaukee-Eight (M8) engines
- Features a distinctive wrinkle black finish with a polished highlight
- Ready to be paired with S&S pistons and gaskets for a complete build
Elevate Your Milwaukee-Eight's Presence
This front cylinder is more than just a performance part; it's a statement piece. The visual appeal of the wrinkle black finish with its polished accents perfectly complements a high-performance build, giving your M8 a custom, aggressive edge. It's the ideal component for riders looking to combine a significant power upgrade with a refined, custom aesthetic, setting the stage for a truly unique Milwaukee-Eight.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-0675
- Bore Size: 4.250 inches
- Position: Front cylinder
- Weight: 11.83 lb
- Finish: Wrinkle black with highlight
Common questions
What size piston do I need with this cylinder?
You should pair this cylinder with S&S pistons and ring sets specifically sized for a 4.250-inch bore. Consult S&S part compatibility charts for your target displacement.
Will this fit my Twin Cam engine?
No, this S&S Cycle cylinder is exclusive to 2017 and newer Milwaukee-Eight (M8) models. Twin Cam engines require different S&S cylinder kits for fitment.
Is machine work on the cases required?
Always have a qualified mechanic confirm fitment and any necessary modifications for your specific year and model. While designed for stock cases, professional installation is recommended.
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 | T14-662021 |
| WEIGHT | 11.83 lb |