✓ VERIFIED
Aug 28, 2023
Everything you expect from S&S
Have installed this kit on multiple bikes. S&S knows what they’re doing.
Image coming soon
S&S CYCLE
SKU: T14-1020378
S&S Cycle Power Packs Forged Piston & Ring Sets - Harley Touring, Softail, Dyna
$3,294.95
Free shipping on orders $99+ · Best value guarantee
affirm
From $274.57/mo with Affirm.
See if you prequalify
OUT OF STOCK
Free Shipping on orders $99+
Best Value Guarantee
30-Day Returns — see policy
Authorized Dealer — sourced direct
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 engineered to uncork more displacement and horsepower from your Harley-Davidson engine. These comprehensive kits include forged pistons, rings, and pins, providing everything needed for a robust engine assembly.
Why riders pick this
- Increase engine displacement and horsepower
- Forged piston construction for extreme durability
- Complete set with pistons, rings, and pins
- Engineered for Harley-Davidson performance builds
When it's time to build a motor that truly performs, S&S Cycle Power Packs deliver the foundation you need. These forged piston and ring sets are designed to increase the displacement and horsepower of your Harley-Davidson, whether you're working with stock or modified engine cases.
Unleash More Power
- Forged piston construction for superior strength and durability
- Designed to increase engine displacement for significant power gains
- Includes piston rings and pins for a complete installation
- Engineered specifically for various Harley-Davidson engine platforms
Building a Performance Engine
Installing a Power Pack is a critical step in any performance engine build. While these sets are ready for assembly, ensuring proper bore size and compatibility with your specific Harley-Davidson engine is crucial. Riders aiming for maximum performance often pair these with S&S cams and a high-flow exhaust for a complete stage upgrade.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 310-1388A
- Weight: 44.19 lb
- Category: Engine Components / Piston Sets - Powersports
Common questions
What is included in this S&S Cycle Power Pack?
Each Power Pack includes precision-forged pistons, piston rings, and wrist pins, providing the core components needed for a performance engine upgrade.
Do these pistons require engine case modifications?
These Power Packs are designed for assembly in stock or modified cases. However, verifying specific displacement and bore size compatibility with your engine is essential before ordering.
Will installing these pistons require a new dyno tune?
Yes, increasing engine displacement and compression will alter your air-fuel ratio. A professional dyno tune is always recommended to optimize performance and ensure engine longevity after a piston upgrade.
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 | T14-1020378 |
| WEIGHT | 44.19 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
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!
✓ VERIFIED
Mar 8, 2020
5 Stars
✓ VERIFIED
Jun 6, 2021
I didn't get it yet,can't wait too get it in my bike, than ill leave a review