S&S CYCLE SKU: T14-1020390

S&S Cycle Power Pack Piston Set - Harley Touring, Softail & Dyna

$10.838.000,00
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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.

S&S Cycle Power Packs are high-performance piston sets engineered for Harley-Davidson engines. These OEM-quality components deliver increased displacement and power gains when installed as part of a complete engine build or top-end refresh.

Why riders pick this

  • Increase engine displacement and power output
  • S&S Cycle engineering and manufacturing quality
  • Direct fitment for Harley-Davidson V-twin engines
  • Ideal for top-end refresh or full engine build

When you're chasing more cubes and more grunt from your V-twin, an S&S Cycle Power Pack Piston Set is where the build starts. These precision-engineered pistons are designed to integrate seamlessly into your Harley-Davidson engine, providing a solid foundation for significant performance upgrades. Whether you're refreshing an older motor or building a new beast, S&S delivers the reliability and power gains you expect from a premium engine component.

Engineered for Performance Builds

  • Manufactured to S&S Cycle's exacting engineering standards
  • Designed for increased displacement and enhanced power output
  • Direct fitment for Harley-Davidson V-twin engines
  • Premium-grade piston set for engine builders

The Foundation of a Strong V-Twin

Upgrading your pistons is a critical step in any performance engine build. These S&S Power Packs provide the robust internals needed to handle higher compression and more aggressive cam profiles. Pair them with a performance cam and a proper dyno tune to unlock the full potential of your Harley's engine. Always confirm fitment for your specific model before starting your build.

Specifications

  • Brand: S&S Cycle
  • Manufacturer Part #: 310-1399A
  • Category: Engine Components / Piston Sets - Powersports
  • Weight: 44.19 lb

Common questions

What displacement increase will these pistons give my engine?

Displacement gains depend on the bore size and your original engine configuration. Refer to S&S Cycle's specifications for your exact engine model to confirm.

Do I need a complete engine rebuild to install these?

Power Packs are typically installed as part of a top-end refresh or full engine build. We recommend having a qualified mechanic assess your engine before installation.

Will these pistons work with my existing cylinder heads?

These pistons are designed to work with various cylinder head configurations. We recommend consulting S&S Cycle documentation or your engine builder to ensure compatibility with your specific setup.

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
SKUT14-1020390
WEIGHT44.19 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
5
4 RATINGS
5★ 4
4★ 0
3★ 0
2★ 0
1★ 0
✓ VERIFIED
Aug 28, 2023

Everything you expect from S&S

Have installed this kit on multiple bikes. S&S knows what they’re doing.

— BRETT M
✓ VERIFIED
Apr 13, 2022

100 kit is sick! 10/5/1 compression is perfect for the 585 cams. Not going to burn the tires unless you bounce it, but at 2.7 K it pulls like a freight train. Super fun! Thanks S&S!

— Anonymous
✓ VERIFIED
Mar 8, 2020

5 Stars

— Anonymous
✓ VERIFIED
Jun 6, 2021

I didn't get it yet,can't wait too get it in my bike, than ill leave a review

— Anonymous