S&S CYCLE SKU: T14-662046

S&S Cycle Performance Cylinder & Piston Kit - Harley Milwaukee-Eight

$2.345.000,00
Free shipping on orders $99+ · Best value guarantee
From $195.416,66/mo with Affirm. See if you prequalify
OUT OF STOCK
Free Shipping on orders $99+
Best Value Guarantee
30-Day Returnssee policy
Authorized Dealer — sourced direct
NOT SURE ABOUT FITMENT?

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.

Take your Milwaukee-Eight engine to the next level with this S&S Cycle performance cylinder and piston kit. Engineered for high-output modifications, this kit provides the foundation for significant power gains. Choose from multiple bore sizes to precisely match your displacement and performance objectives.

Why riders pick this

  • Available in multiple bore sizes
  • Designed for 2017+ Milwaukee-Eight engines
  • Engineered for high-output performance builds
  • Increases engine displacement and compression

Building a high-performance Milwaukee-Eight demands top-shelf components, and this S&S Cycle cylinder and piston kit delivers. Designed for serious engine builders, it allows for a substantial increase in displacement and compression, critical for unlocking maximum horsepower and torque. Whether you're planning a street bruiser or a track weapon, this kit offers the flexibility and quality needed to achieve your goals.

Tailor Your Power Output

  • Available in multiple bore sizes for custom displacement targets
  • Designed for 2017 and newer Milwaukee-Eight engines
  • Engineered for high-output performance builds
  • S&S Cycle quality for reliability and power

The Heart of a Custom M8 Build

This S&S Cycle kit is more than just a replacement part; it's a performance upgrade that forms the core of a powerful Milwaukee-Eight engine. Selecting the right bore size allows you to fine-tune your engine's characteristics, preparing it for aggressive cam profiles, ported heads, and advanced tuning strategies. Due to the precision required, professional installation by a qualified V-twin mechanic is strongly recommended.

Specifications

  • Brand: S&S Cycle
  • Manufacturer Part #: 920-0151
  • Category: Engine Components / Piston Sets - Powersports
  • Weight: 3.22 lb

Common questions

What bore sizes are available with this kit?

This S&S Cycle kit is available in multiple bore sizes, allowing you to select the optimal displacement for your specific Milwaukee-Eight performance build.

Will this fit my pre-2017 Harley Twin Cam or Evolution engine?

No, this kit is specifically designed for 2017 and newer Milwaukee-Eight (M8) engines. Twin Cam and Evolution models require different S&S cylinder and piston kits.

Is professional installation required for this kit?

Yes, installing cylinder and piston kits requires specialized tools and expertise to ensure correct assembly, clearances, and optimal engine performance. Professional installation is highly 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.
BRANDS&S Cycle
TYPEPiston Sets - Powersports
SKUT14-662046
WEIGHT3.22 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
5★ 7
4★ 1
3★ 0
2★ 0
1★ 0
✓ VERIFIED
Sep 26, 2019

Really nice kit great directions for install and ring gap. Follow the directions and you can't go wrong..

— Anonymous
✓ VERIFIED
Apr 26, 2022

Excellent service and pricing im very satisfied

— Anonymous
✓ VERIFIED
Sep 26, 2019

Better than OEM.. can't go wrong.

— Anonymous
✓ VERIFIED
Mar 30, 2026

Very happy with this kit

Simple, easy kit.

— Joe G
✓ VERIFIED
Mar 29, 2026

SMS makes great aftermarket upgrades

— Ron B
✓ 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.

— Bruce H