✓ VERIFIED
Sep 26, 2019
Really nice kit great directions for install and ring gap. Follow the directions and you can't go wrong..
S&S CYCLE
SKU: T14-662029
S&S Cycle .010 Oversized Cylinder & Piston Kit - Harley Milwaukee-Eight
$636.95
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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.
Unleash more power from your Milwaukee-Eight engine with this S&S Cycle cylinder and piston kit. Engineered for 2017 and newer Harley-Davidson models, this kit boosts your engine's displacement and compression. Experience a noticeable increase in both horsepower and torque for a more responsive ride.
Why riders pick this
- Increases engine displacement and compression
- Designed for 2017+ Milwaukee-Eight engines
- Boosts horsepower and torque output
- Ideal for performance-focused engine builds
When you're chasing serious power out of your Milwaukee-Eight, a cylinder and piston kit is a fundamental upgrade. This S&S Cycle kit delivers a significant displacement and compression increase over stock, translating directly into more usable power across the RPM range. It's designed for riders who demand more from their M8, whether on the street or at the drag strip.
Unlock Next-Level Performance
- Engineered for a significant increase in engine displacement
- Boosts compression for improved throttle response and power
- Designed specifically for 2017 and newer Milwaukee-Eight engines
- Optimized for performance builds seeking maximum output
The Foundation of a Performance Build
Installing a cylinder and piston kit is a critical step in building a high-performance Milwaukee-Eight engine. This S&S Cycle kit provides the robust foundation needed to support further upgrades like cam swaps, head work, and a proper dyno tune. Professional installation is recommended to ensure optimal performance and longevity, allowing you to fully realize the power potential of your Harley.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 920-0142
- Bore x Stroke: 4.250 in x 4.500 in
- Oversizing: 0.010 in
- Category: Engine Components / Piston Sets - Powersports
- Weight: 3.22 lb
Common questions
Will this kit fit my Twin Cam engine?
No, this S&S Cycle kit is engineered exclusively for 2017 and newer Milwaukee-Eight (M8) engines. Twin Cam models require a different S&S piston kit.
Do I need an engine tune after installing this kit?
Yes, increasing engine displacement and compression will require a proper dyno tune to optimize fuel delivery and ignition timing for peak performance and engine longevity.
Is this a bolt-on upgrade?
While the kit is designed for direct fitment, cylinder and piston installation typically requires disassembling the top end of your engine and should be performed by an experienced mechanic.
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 | T14-662029 |
| WEIGHT | 3.22 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.
