✓ VERIFIED
Sep 26, 2019
Really nice kit great directions for install and ring gap. Follow the directions and you can't go wrong..
Image coming soon
S&S CYCLE
SKU: T14-662042
S&S Cycle 4.320" Bore Rear Cylinder, Wrinkle Black - Harley Milwaukee-Eight
$1.438.000,00
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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 2017+ Harley-Davidson Milwaukee-Eight engine with this S&S Cycle Rear Cylinder, featuring a robust 4.320-inch bore. Finished in a clean wrinkle black, this high-performance replacement cylinder is built to OEM specifications and engineered for durability. It's an ideal choice for street and touring applications, providing a solid foundation for your M8 powerplant.
Why riders pick this
- 4.320-inch bore for Milwaukee-Eight engines
- Classic wrinkle black finish
- For 2017 and newer M8 compatibility
- High-performance replacement cylinder
- Engineered for durability in V-twin applications
When you're building out a Milwaukee-Eight engine, every component matters. This S&S Cycle rear cylinder provides the precision and strength needed for demanding V-twin applications. With its 4.320-inch bore, it's ready to support enhanced displacement and power, while the wrinkle black finish ensures it integrates seamlessly with your engine's aesthetic. Trust S&S Cycle engineering for components that perform.
Durable Construction, Clean Finish
- Features a 4.320-inch bore for Milwaukee-Eight engines
- Classic wrinkle black finish without highlight detailing
- Designed for 2017 and newer M8 engine compatibility
- S&S Cycle engineered for high-performance and durability
Precision for Your M8 Build
This rear cylinder is a crucial component for anyone undertaking a top-end rebuild or a performance upgrade on their 2017+ Milwaukee-Eight. While this is a rear cylinder only, it provides the flexibility to replace a damaged component or build a custom engine with perfectly matched front and rear cylinders. Always confirm your engine's bore size and displacement before ordering to ensure optimal compatibility and performance.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-0842
- Bore Size: 4.320 inches
- Position: Rear Cylinder
- Finish: Wrinkle black
- Weight: 12.7 lb
- Category: Engine Components / Piston Sets - Powersports
Common questions
Will this S&S Cycle rear cylinder fit my 2017+ Milwaukee-Eight Harley-Davidson?
Yes, this rear cylinder is designed to fit 2017 and newer Harley-Davidson Milwaukee-Eight engines with a stock 4.320-inch bore. Always confirm your engine's bore size before purchase.
Do I need to purchase a matching front cylinder separately?
Yes, this product is for a rear cylinder only. If you are performing a complete top-end rebuild, you will need to order the matching front cylinder separately.
What is the bore size of this S&S Cycle rear cylinder?
This S&S Cycle rear cylinder features a 4.320-inch bore, designed specifically for Milwaukee-Eight engines.
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 | T14-662042 |
| WEIGHT | 12.7 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.88
8 RATINGS
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✓ VERIFIED
Apr 26, 2022
Excellent service and pricing im very satisfied
✓ VERIFIED
Sep 26, 2019
Better than OEM.. can't go wrong.
✓ VERIFIED
Mar 30, 2026
Very happy with this kit
Simple, easy kit.
✓ VERIFIED
Mar 29, 2026
SMS makes great aftermarket upgrades
✓ VERIFIED
Oct 24, 2025
👍👍 For fast delivery
Parts came just like as expected. They look great! Can't wait to install these bad boys along with a few other parts.