S&S CYCLE SKU: T14-1020379

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

$10.838.000,00
Free shipping on orders $99+ · Best value guarantee
From $903.166,66/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.

S&S Cycle Power Packs are complete piston sets meticulously engineered for Harley-Davidson engine rebuilds and performance upgrades. Built to S&S Cycle's exacting specifications, these pistons ensure durability and reliable performance in both stock and modified V-twin engines.

Why riders pick this

  • Complete piston set for engine rebuilds
  • S&S Cycle engineered for durability
  • Reliable performance in modified engines
  • Compatible with Harley-Davidson V-Twin
  • Foundation for performance upgrades

When it's time for an engine refresh or a significant performance boost for your Harley-Davidson, the quality of your pistons is paramount. S&S Cycle Power Packs provide the foundation for a strong and reliable powerplant. These complete piston sets are designed to withstand the rigors of high-performance riding while offering the precision and durability expected from S&S Cycle engineering.

Engineered for Durability

  • S&S Cycle engineering for proven performance
  • Ready for Harley-Davidson engine rebuilds
  • Compatible with a wide range of Harley-Davidson engines
  • Built for reliable performance in stock and modified applications

The Heart of Your V-Twin

Power Packs are more than just replacement pistons; they're a critical upgrade for any Harley rider serious about their engine's health and output. Whether you're refreshing an aging engine or pushing the limits with a big-bore conversion, these piston sets deliver. Due to the precision required, piston installation on Harley-Davidson engines demands professional machine work. Always consult S&S Cycle fitment charts or your engine builder to confirm compatibility with your specific displacement and model before undertaking installation.

Specifications

  • Brand: S&S Cycle
  • Manufacturer Part #: 310-1391A
  • Category: Engine Components / Piston Sets - Powersports
  • Weight: 44.19 lb

Common questions

What is included in an S&S Cycle Power Pack?

An S&S Cycle Power Pack includes a complete piston set with all necessary components for engine assembly. Please verify your order quantity matches your engine's displacement and cylinder count.

Do I need a machine shop to install these pistons?

Yes, piston installation on Harley-Davidson engines requires professional engine machine work, including cylinder boring and honing. Do not attempt installation without proper equipment and expertise.

Will these pistons work with my stock Harley heads and barrels?

S&S Cycle Power Packs are designed for Harley-Davidson engines. However, for specific compatibility with your stock heads and barrels, especially with modified applications, consult S&S Cycle fitment information or your engine builder.

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
SKUT14-1020379
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