Wiseco 1340cc EVO Big Twin 10:1 Compression Piston Kit - Harley Evolution Touring, Softail & Dyna
About Wiseco
Wiseco has forged pistons in Mentor, Ohio since 1941, supplying everything from factory race teams to big-bore street builds. Forged construction is what lets a V-twin survive higher compression and more cylinder pressure than the stock cast piston was designed for.
Unleash the full potential of your 1340cc Evolution Big Twin with a Wiseco V-Twin Piston Kit. Engineered for strength and optimal heat transfer, these pistons are crucial for any performance build or refresh. Experience the difference of components designed to handle the demands of the open road.
Why riders pick this
- Forged high-silicon, low-expansion aluminum construction
- Diamond-turned finish ensures zero size variation
- Direct fit for stock and rebored cylinders
- Compatible with cast iron, chrome, nikasil, and boron composite sleeves
- Optimized for strength and heat transfer
This Wiseco V-Twin piston kit is specifically designed for 1340cc EVO Big Twin engines, offering a 10:1 compression ratio that's ideal for a wide range of riding styles. Forged from high-silicon aluminum, these pistons deliver superior strength and heat dissipation compared to cast alternatives. They are a direct fit for both stock and rebored cylinders, accommodating cast iron, chrome, nikasil, and boron composite sleeves with ease, making them a versatile choice for your Harley-Davidson.
Engineered for Lasting Performance
- Forged high-silicon, low-expansion aluminum for exceptional strength
- Diamond-turned finish for precise sizing and consistent performance
- Compatible with all common cylinder bore materials
- Reduced weight helps improve engine response and reduce wear
The Foundation of a Strong Build
Whether you're doing a routine rebuild or chasing more power from your Evolution Big Twin, these Wiseco pistons provide a robust foundation. Their design ensures excellent compatibility with various cylinder types, simplifying the installation process. Pair them with a proper cam and a dyno tune to truly uncork your motor's potential and enjoy a more responsive ride.
Specifications
- Brand: Wiseco
- Manufacturer Part #: K1668
- Compression Ratio: 10:1
- Engine Displacement: 1340cc EVO Big Twin
- Length: 9.6 in
- Width: 5 in
- Height: 4 in
- Weight: 2.5 lbs
Common questions
Will this piston kit work with my rebored cylinders?
Yes, Wiseco pistons are engineered to fit both stock bore and oversized applications, making them suitable for cylinders that have been rebored.
What type of cylinder sleeves are these pistons compatible with?
These pistons are compatible with a wide range of cylinder sleeve materials, including cast iron, chrome, nikasil, and boron composite.
Do I need to make any modifications for installation?
These pistons are designed for direct fitment in 1340cc EVO Big Twin engines. Always confirm fitment with your specific year and model using our Shop by Bike tool.
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 | Wiseco |
| TYPE | Piston kits & Components |
| SKU | K1668 |
| WEIGHT | 2.5 lb |
| 10 | 1 Compression |
