✓ VERIFIED
Aug 28, 2023
Everything you expect from S&S
Have installed this kit on multiple bikes. S&S knows what they’re doing.
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S&S CYCLE
SKU: T14-1020336
S&S Cycle Power Pack 4.32" Big-Bore Kit - Harley V-Twin
$3,294.95
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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 engine-build kits that combine 4.32" big-bore cylinders with matched pistons, cam, cam plate, and an oil pump. This comprehensive package is designed to transform a stock Harley into a high-output street engine, with every internal component perfectly matched for reliable peak horsepower.
Why riders pick this
- 4.32" big-bore cylinders included
- Matched piston and ring set
- Cam, cam plate, and oil pump included
- All internal components pre-matched
- Transforms into a high-output street engine
This Power Pack ships ready to install, providing all the critical components needed to significantly upgrade your Harley's displacement and performance. S&S Cycle's meticulous matching of parts ensures that you get a cohesive system engineered for maximum power and durability. It's a strategic investment for riders who are serious about extracting the most performance from their V-twin, offering a proven path to a more powerful and responsive motorcycle.
Integrated High-Performance Engine Kit
- Features 4.32" big-bore cylinders for a substantial displacement increase
- Includes a precisely matched piston and ring set
- Comes with a performance cam, cam plate, and high-flow oil pump
- All internal components are pre-matched for optimal reliability and power
- Designed to deliver a significant boost in engine output
Unleash Your Harley's Potential
Installing an S&S Cycle Power Pack is a major step towards building a truly high-performance Harley Touring, Softail, or Dyna. While the kit provides top-tier components, professional installation, and a custom dyno tune are absolutely essential to ensure proper function, maximize horsepower, and maintain engine longevity. This kit is built for the rider who demands uncompromising power and reliability from their V-twin.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 310-1225D
- Category: Engine Components / Piston Sets - Powersports
- Weight: 44.19 lb
Common questions
What exactly is included in this S&S Power Pack?
This Power Pack includes big-bore cylinders, pistons, rings, a performance cam, cam plate, oil pump, and all other matched internal components necessary for installation into a compatible Harley engine.
Do I need a tuner or engine management system with this kit?
Yes, a proper fuel map and professional dyno tune are absolutely essential after installing any big-bore kit. This ensures optimal drivability, reliability, and maximizes the horsepower gains from your S&S Power Pack.
Will this Power Pack fit my specific Harley year and model?
S&S Cycle offers various Power Packs. Please verify specific year and engine family compatibility using our 'Shop by Bike' tool or by consulting with an S&S Cycle expert or your trusted V-twin builder before ordering to ensure correct fitment.
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 | T14-1020336 |
| WEIGHT | 44.19 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
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✓ 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