Wiseco Black Edition 103 CID 10.5:1 +.010 Piston Kit - Harley Twin Cam
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.
Maximize the power and longevity of your Twin Cam 103 CID engine with the Wiseco Black Edition Piston Kit. This +.010 oversized kit is engineered for engines requiring a slight bore increase, delivering a robust 10.5:1 compression ratio for enhanced performance.
Why riders pick this
- +.010 oversized for bore increase
- Boosts compression to 10.5:1 for increased power
- Advanced Armor X and ArmorGlide coatings reduce wear and friction
- Optimized ring design for superior oil control and sealing
- Compatible with OEM and Screamin' Eagle cylinder heads
These Wiseco Black Edition pistons are built for the rigors of high-performance V-twin operation. Featuring advanced Armor X and ArmorGlide coatings, they significantly reduce friction and wear while ensuring consistent oil control. The premium ring package, including a Napier second ring, is designed for superior sealing and oil management, making this kit an ideal choice for a Twin Cam rebuild or performance upgrade.
Enhanced Durability and Performance
- Premium compression ring for an ultimate combustion seal
- Napier second ring with taper face and underhook for improved oil control
- 3mm oil ring design with higher tension for enhanced lubrication management
- Armor X piston coating reduces wear and extends piston life
- ArmorGlide skirt coating minimizes friction and improves scuff resistance
Optimized for Oversized Twin Cam Rebuilds
When your Twin Cam 103 requires a slight overbore, this +.010 oversized Wiseco Black Edition piston kit is the answer. It provides the foundation for a durable, high-compression engine rebuild. The 10.5:1 compression ratio is a proven performer, offering a significant power boost. Ensure your cylinders are bored and honed to match the +.010 specification for optimal fitment and performance, and plan for a proper dyno tune to unlock its full potential.
Specifications
- Brand: Wiseco
- Manufacturer Part #: K2793
- Engine: Twin Cam 103 CID
- Compression Ratio: 10.5:1
- Oversized: +.010
- Length: 9 in
- Width: 4 in
- Height: 4 in
- Weight: 2.4 lbs
Common questions
Will these pistons work with my stock Harley heads?
Yes, these Wiseco Black Edition pistons are designed to be compatible with both OEM Harley-Davidson and Screamin' Eagle cylinder heads.
What does +.010 oversized mean?
The +.010 designation means these pistons are designed for cylinders that have been bored out by ten thousandths of an inch (.010") beyond the standard size, typically done during an engine rebuild to clean up cylinder walls.
Do I need to get my engine tuned after installing these pistons?
Yes, a dyno tune is essential after installing new pistons that change the compression ratio and bore size to ensure proper fuel mapping and ignition timing for optimal performance and engine reliability.
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 | Black |
| SKU | K2793 |
| WEIGHT | 2.4 lb |
