S&S CYCLE SKU: T14-1020383

S&S Cycle Power Pack Piston and Ring Assembly - Harley-Davidson Engines

$3,497.95
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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.

S&S Cycle Power Packs are complete piston and ring assemblies designed to increase displacement and compression in Harley-Davidson engines. These direct-fit replacements swap in place of stock pistons to deliver more power without major engine modifications, making them a straightforward upgrade.

Why riders pick this

  • Complete piston and ring assembly for direct replacement
  • Increases engine displacement for more power
  • Achieves a higher compression ratio for better performance
  • S&S Cycle engineering for reliable operation
  • Drop-in solution for a significant power upgrade

Upgrade your Harley-Davidson engine with the S&S Cycle Power Pack piston and ring assembly, engineered for a direct swap to boost performance. This assembly is designed to drop in, replacing your stock pistons to unlock increased displacement and a higher compression ratio. The result is a noticeable gain in power and responsiveness without the need for extensive custom work.

Engineered for Enhanced Performance

  • Complete piston and ring assembly for easy installation
  • Designed for increased displacement compared to stock
  • Higher compression ratio for improved power output
  • S&S Cycle engineering ensures precise fit and reliable operation
  • Direct drop-in replacement for stock pistons

Unlock More Power

The beauty of this S&S Cycle Power Pack lies in its simplicity and effectiveness. By upgrading your pistons, you're directly impacting the engine's ability to create power. This makes it an excellent choice for riders looking for a measurable performance increase without venturing into a full engine build. Always consult the S&S installation guide for your specific engine, as cylinder prep may be required depending on current bore condition.

Specifications

  • Brand: S&S Cycle
  • Manufacturer Part #: 310-1403A
  • Category: Engine Components / Piston Sets - Powersports
  • Weight: 44.19 lb

Common questions

What's included in the Power Pack?

This S&S Cycle Power Pack includes a complete piston and ring assembly, ready to install into compatible Harley-Davidson engines.

Do I need to hone my cylinders before installing?

You should always check the S&S installation guide for your specific engine. Cylinder prep, such as honing, may be required depending on the current condition of your cylinder bores.

Will this increase my horsepower?

Yes, the increased displacement and higher compression ratio delivered by this Power Pack are designed to provide measurable power gains over your stock 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
SKUT14-1020383
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