S&S Cycle 4.250" Rear Cylinder Wrinkle Black - Harley 2017 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 rear cylinder is engineered specifically for 2017 Harley-Davidson Milwaukee-Eight (M8) models, featuring a 4.250-inch bore. Finished in a rugged wrinkle black, this cylinder is a key component for increasing displacement and power output when paired with compatible pistons and gasket sets. It offers a robust foundation for serious engine upgrades.
Why riders pick this
- 4.250-inch bore for increased M8 displacement
- Designed for 2017 Harley-Davidson Milwaukee-Eight
- Rugged wrinkle black finish
- Rear cylinder for performance engine builds
- Part of S&S displacement kit upgrades
For riders looking to push the limits of their 2017 Milwaukee-Eight, this S&S Cycle rear cylinder provides the necessary foundation for a significant displacement increase. Designed for durability and performance, its 4.250-inch bore allows for greater cubic inches, translating to more usable torque and horsepower. The wrinkle black finish adds a custom, aggressive look that complements any performance build.
Unlock Greater Displacement and Power
- Features a 4.250-inch bore diameter for increased displacement
- Specifically designed for 2017 Harley-Davidson Milwaukee-Eight engines
- Durable wrinkle black finish for a custom look
- Complete rear cylinder casting for robust engine builds
Essential for M8 Displacement Kits
This S&S Cycle rear cylinder is a critical part of a complete displacement kit for your 2017 M8. To achieve maximum performance and reliability, it must be paired with the correct pistons, wrist pins, rings, and a full gasket set. Professional installation and precise assembly are highly recommended. Always verify complete kit compatibility and follow S&S Cycle's guidelines before ordering to ensure optimal results for your V-twin.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-0674
- Bore Diameter: 4.250 in
- Position: Rear
- Weight: 11.83 lb
- Category: Engine Components / Piston Sets - Powersports
Common questions
Is this a complete piston kit, or just the cylinder?
This product is for the rear cylinder only. To complete a full displacement kit, you will also need matching pistons, wrist pins, rings, and gaskets.
What specific year Milwaukee-Eight models does this cylinder fit?
This S&S Cycle rear cylinder is designed specifically for 2017 Harley-Davidson Milwaukee-Eight (M8) models. Always verify fitment for your exact year and model.
Will this cylinder require a special tune?
Any significant engine modification, such as a displacement increase, will require a professional fuel tune to optimize performance, ensure proper air/fuel ratios, and prevent engine damage.
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 | T14-662023 |
| WEIGHT | 11.83 lb |